QUANTECH LTD /MN/
S-3/A, 1997-07-30
COMPUTER STORAGE DEVICES
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       As filed with the Securities and Exchange Commission on July 30, 1997
    
                                                   Registration No. 333-6809


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
   
            POST-EFFECTIVE AMENDMENT NO. 3 TO FORM SB-2 REGISTRATION
                  STATEMENT ON FORM S-3 REGISTRATION STATEMENT
                        Under The Securities Act of 1933
    
                                  QUANTECH LTD.
           (Name of Small Business Issuer as specified in its Charter)

    Minnesota                       3573                     41-1709417
(State or other        (Primary Standard Industrial        (I.R.S. Employer
Jurisdiction of            Classification Code          Identification Number)
Incorporation or                  Number)
 Organization)   

                                  Quantech Ltd.
                             1419 Energy Park Drive
                            St. Paul, Minnesota 55108
                                 (612) 647-6370

                   (Address and Telephone Number of Principal
               Executive Offices and Principal Place of Business)

   
                          Gregory Freitag, CFO and COO
                                  Quantech Ltd.
                             1419 Energy Park Drive
                            St. Paul, Minnesota 55108
                                 (612) 647-6370

    
                       (Name, Address and Telephone Number
                              of Agent for Service)

                                   Copies to:

                             Timothy M. Heaney, Esq.
                            Fredrikson & Byron, P.A.
                       900 Second Avenue South, Suite 1100
                          Minneapolis, Minnesota 55402
                                 (612) 347-7000

<PAGE>

     Approximate  date of proposed  sale to the public:  From time to time after
the  effective  date of this  Registration  Statement  as  determined  by market
conditions and other factors.

     If any of the securities  being  registered on this form to be offered on a
delayed or continuous  basis,  pursuant to Rule 415 under the  Securities Act of
1933, check the following box: [x]

     If this Form is filed to  register  additional  securities  of an  offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  statement  number  of the  earlier
effective registration statement for the same offering: [ ]

     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the Securities Act, please check the following box and list the Securities
Act  registration   statement  number  of  the  earlier  effective  registration
statement for the same offering: [ ]

     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
please check the following box: [ ]


The Registrant hereby amends this  Registration  Statement on such date or dates
as may be necessary to delay its effectiveness until the Registrant shall file a
further amendment which  specifically  states that this  Registration  Statement
shall  thereafter  become  effective  in  accordance  with  Section  8(a) of the
Securities Act of 1933, as amended,  or until the  Registration  Statement shall
become effective on such date as the Commission, acting pursuant to said Section
8(a), may determine.



<PAGE>
















   

One of purposes  of this  Post-Effective  Amendment  No. 3 is to  deregister  an
aggregate of  22,529,627  shares of Common Stock because such shares have become
eligible for resale  pursuant to Rule 144(k) of the  Securities  Act of 1933, as
amended.

    





<PAGE>










PROSPECTUS




                                  QUANTECH LTD.
   
                        26,491,903 SHARES OF COMMON STOCK
    

   
     This Prospectus relates to the offer and sale of up to 26,491,903 shares of
Common  Stock (the  "Shares"),  par value $.01 per share,  of Quantech  Ltd.,  a
Minnesota  corporation  (the  "Company"  or  "Quantech"),  by  persons  who  are
currently  shareholders  of the  Company's  Common  Stock or who may become such
holders  upon  exercise of Warrants to purchase  shares of Company  Common Stock
(the "Selling  Shareholders").  The Selling  Shareholders may offer their Shares
from time to time  through or to  brokers  or  dealers  in the  over-the-counter
market  at  market  prices  prevailing  at the  time  of  sale or in one or more
negotiated  transactions at prices acceptable to the Selling  Shareholders.  The
Company  will not  receive any  proceeds  from the sale of Shares by the Selling
Shareholders. See "Plan of Distribution."
    

     The Company will bear all expenses of the offering  (estimated at $35,000),
except  that the  Selling  Shareholders  will pay any  applicable  underwriter's
commissions and expenses,  brokerage fees or transfer taxes, as well as any fees
and disbursements of counsel and experts for the Selling Shareholders.

   
     Quantech's Common Stock is traded on the local  over-the-counter and Nasdaq
Bulletin  Board markets under the symbol of QQQQ.  The closing sale price of the
Common Stock on July 29, 1997, as reflected on such markets was $0.21 per share.
    

                           -------------------------


                 The Common Stock offered by this Prospectus is
               speculative and involves a high degree of risk. See
                      "Risk Factors" beginning on page 4."

                            -------------------------


          THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE
           SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
            COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION
               OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
               ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRE-
                SENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.




   
                  The date of this Prospectus is July 30, 1997

    

<PAGE>




     No  person  is  authorized  to  give  any   information   or  to  make  any
representations, other then those contained or incorporated by reference in this
Prospectus,  in connection with the offering  contemplated hereby, and, if given
or made, such information or  representations  must not be relied upon as having
been authorized by the Company.  This Prospectus does not constitute an offer to
sell  or a  solicitation  of an  offer  to buy any  securities  other  than  the
registered  securities to which it relates or in any  jurisdiction to any person
to whom it is unlawful to make such offer or solicitation in such  jurisdiction.
Neither the delivery of this Prospectus nor any sale made hereunder shall, under
any  circumstances,  create any implication that there has been no change in the
affairs of the Company since the date hereof or that the  information  contained
or incorporated by reference  herein is correct as of any time subsequent to its
date.

                              AVAILABLE INFORMATION

     Prior to this  Offering,  the  Company  has been  subject to the  reporting
requirements of the Securities Exchange Act of 1934 (the "Exchange Act"), and in
accordance therewith files reports,  proxy statements and other information with
the Commission.  The Company has filed with the  Washington,  D.C. Office of the
Commission a Registration Statement under the Securities Act of 1933, as amended
(the "Securities Act"), with respect to the sale of the Shares.  This Prospectus
does not contain all of the information set forth in the Registration Statement,
certain  portions  of which  have been  omitted  as  permitted  by the rules and
regulations  of the  Commission.  For further  information  with  respect to the
Company  and  the  Shares,  reference  is made  to the  Registration  Statement,
including the exhibits  thereto.  Statements  contained in this Prospectus as to
the contents of any contract or other document  referred to are not  necessarily
complete, and in each instance reference is made to the copy of such contract or
other  document  filed  as  an  exhibit  to  the  Registration  Statement.   The
Registration  Statement and the Company's Exchange Act reports, proxy statements
and other information may be inspected by anyone without charge at the principal
office of the  Commission at 450 Fifth Street,  N.W.,  Washington,  D.C.  20549.
Copies of all or any part of such  material may be obtained  upon payment of the
prescribed fees from the Public Reference Section of the Commission at 450 Fifth
Street, N.W., Washington, D.C. 20549. The Registration Statement and the Company
Exchange  Act  filings may also be accessed  through the  Commission's  Web site
(http://www.sec.gov).

                       DOCUMENTS INCORPORATED BY REFERENCE

     The following documents filed by the Company with the Commission are hereby
incorporated by reference in this Prospectus:


     The  Company's  Annual Report on Form 10-KSB for the fiscal year ended June
     30, 1996.

     The  Company's  Quarterly  Report  on Form  10-QSB  for the  quarter  ended
     September 30, 1996. 

     The Company's  Quarterly  Report on Form 10-QSB for the
     quarter ended  December 31, 1996.  

     The Company's  Quarterly  Report on Form 10-QSB for the quarter ended 
     March 31, 1997.

     All documents filed by the Company pursuant to Sections 13(a), 13(c), 14 or
15(d) of the  Exchange  Act after the date of this  Prospectus  and prior to the
termination of the offering of the Shares shall be deemed to be  incorporated by
reference in this  Prospectus and to be a part hereof from the date of filing of
such documents.

     The Company  will provide  without  charge to each  person,  including  any
beneficial  owner,  to whom a copy of this  Prospectus  is  delivered,  upon the
written or oral  request of such person,  a copy of any or all of the  documents
incorporated  herein by reference (not including the exhibits to such documents,
unless  such  exhibits  are  specifically  incorporated  by  reference  in  such
documents).  Requests for such copies  should be directed to Gregory G. Freitag,
Chief  Financial  Officer,  Quantech  Ltd.,  1419 Energy Park Drive,  St.  Paul,
Minnesota 55108, telephone (612) 935-3311.



<PAGE>



                                 COMPANY SUMMARY
   
     Quantech Ltd. ("Quantech" or the "Company") is a Minnesota company with its
principal  executive  offices  located at 1419  Energy  Park  Drive,  St.  Paul,
Minnesota 55108, telephone (612) 647-6370.  Quantech is seeking to commercialize
its proprietary  Surface  Plasmon  Resonance  ("SPR")  technology for use in the
critical care medical diagnostic market.  SPR, the core technology of Quantech's
medical  diagnostic  system,  enables  the  Company to  integrate  the  existing
diagnostic methodologies of immunoassays, DNA probes and chemical binding into a
single,  simple,  economical  system in order to  provide  rapid,  quantitative,
diagnostic results near the patient. The Quantech system configuration  consists
of a small,  bench top instrument  and a series of  disposables  each offering a
particular test or series of tests.  This system is expected to have the ability
to analyze body fluids (e.g., whole blood, urine, saliva) without preparation or
addition of reagents by lab technicians,  providing  hospital  physicians faster
test results than currently obtained from labs.
    

   
         Excluding home diagnostics,  the overall world wide in-vitro diagnostic
market is growing,  estimated at $13.2 billion in 1994,  and expected to grow to
$17.5  billion  by the year  2000,  according  to a report  issued  by  Decision
Resources,  Inc., entitled  "Point-of-Care  Testing:  Status and Prognosis," and
dated April 1996. Central labs currently account for the majority of this market
while near patient ("NP") products represent only a small portion.  Introduction
of additional NP products,  such as Quantech's system, are expected to cause the
NP testing market to gain a larger percentage of the overall in-vitro diagnostic
market.  The extent of such  market  shift will be  affected  by the  ability to
provide fast, cost effective and quantitative NP testing products.
    

   
        Quantech's  business  strategy  is to  capitalize  on  the  flexibility,
sensitivity  and relatively  low cost of its diagnostic  system to penetrate the
diagnostic market.  Quantech's  intended entry into this market will be Critical
Care Units of hospitals,  the first unit being the Emergency  Department  ("ED")
where the most pressing and unmet  customer  needs are found.  The Critical Care
Units  represent  a  significant  market  as they  require  a  number  of  rapid
turn-around  tests.  Although there are some NP tests available for the Critical
Care Units,  the Company is not aware of any  existing NP testing  product  that
provides a single instrument that will perform most of the tests required in the
ED.  Additionally,  minimal competition exists for NP testing products in the ED
from multinational companies that are focused on the central lab market.
    

   
        There are  approximately  30  commonly  ordered  tests in the ED, all of
which are ordered  STAT (very  urgent).  Some of the most  important  diagnostic
tests in the ED are cardiac  markers.  These  tests help to  identify  whether a
patient  experiencing  chest pain has  suffered a myocardial  infarction  (heart
attack).  The Company believes there is currently no available  product that has
the  capability  of  economically  performing  STAT,  whole blood  testing  with
quantitative  results.  Quantech's  first tests are  expected to quantify  these
markers in approximately five minutes.  Similar results are presently  available
from the central lab in 45 to 90 minutes.
    

   
        Quantech  believes  the  benefits  of its  system  over other NP testing
products are that the same  instrument  will be able to be used for a full range
of tests and provide  quantitative  results.  After the initial  introduction of
tests for myocardial  infarction,  the Company  intends to introduce  additional
tests at the rate of one per  quarter.  Selection  of these  tests will be based
upon market demand, ease of development,  regulatory hurdles and profit margins.
The Company intends future expansion into other critical care diagnostic markets
which have needs similar to the ED. The timetable for  submitting  the Company's
system to the FDA and  introduction  to the  market  will be  influenced  by the
Company's  ability to complete  prototype  development of its system,  necessary
testing for  submission of its FDA filing and delays it may  encounter  with the
FDA in its  review  of the  system.  Once its  system  is  introduced,  Quantech
believes  the  capabilities  of such system as a rapid and  flexible  diagnostic
testing platform meets the needs of the critical care diagnostic market and will
enable Quantech to be competitive in the global medical diagnostics market.
    

<PAGE>


                                  RISK FACTORS

     An investment in the securities  offered hereby is speculative and involves
a high degree of risk. In addition to the other  information in this Prospectus,
the following factors should be considered  carefully by potential purchasers in
evaluating an investment in the Common Stock of the Company.

No History of Operations; Development Stage Company; Going Concern Uncertainty

     The Company (through  predecessor  entities) was organized in December 1989
and acquired its technology in November  1991.  Since November 1991, the Company
has been conducting development of SPR technology and the associated patents and
proprietary  information  encompassed in the License, as defined below. To date,
the  Company  does not have a product  ready to be  brought  to  market  and has
experienced  delays in completing  development,  but is continuing  research and
development on its prototype and associated test disposables.  Accordingly,  the
Company has no operating history and its proposed  operations are subject to all
of  the  risks  inherent  in a new  business  enterprise,  including  commercial
development of its products, lack of marketing experience and lack of production
history.

   
     The likelihood of the success of the Company must be considered in light of
the expenses,  difficulties and delays frequently encountered in connection with
the start-up of new businesses,  and specifically those historically encountered
by the  Company,  and the  competitive  environment  in which the  Company  will
operate.  The Company has not had significant  revenues to date. As of March 31,
1997, the Company had an accumulated  deficit of $13,431,933.  The report of the
independent  auditors on the Company's financial statements for the period ended
June 30, 1996, includes an explanatory  paragraph relating to the uncertainty of
the  Company's  ability  to  continue  as a  going  concern.  The  Company  is a
development  stage company which has suffered losses from  operations,  requires
additional  financing,  and ultimately needs to successfully  attain  profitable
operations. These factors raise substantial doubt about the Company's ability to
continue as a going concern.  There can be no assurance that the Company will be
able to develop a  commercially  viable  product or  marketing  system or attain
profitable operations.
    

Future Capital Needs

   
     The  Company  does  not  have  sufficient  funds  to  commence   commercial
production and sales of its system.  The Company's  ability to begin  commercial
production  and sales of its system will depend upon the continued  availability
of  investment  capital,  funding  made by  strategic  partner(s)  or  licensing
revenues,  until  revenues  from sale of the  instruments  and  associated  test
disposables  are  sufficient  to  maintain  operations.   The  Company  recently
completed a private offering of convertible notes and warranties,  raising gross
proceeds of $1,070,000.  The Company  estimates that these proceeds will provide
it with  sufficient  capital to  continue  operations  through  September  1997,
however,  to maintain  operations  through  this period it has ceased  marketing
related  activity and focused all resources on product  development.  Therefore,
additional funds will have to be raised through equity or debt financing.  There
can be no assurance that any  additional  financing can be obtained on favorable
terms,  if at all. Such  additional  financing may result in dilution to Company
shareholders  and/or  debt to the  Company.  If  funding is not  available  when
needed,  the Company may be forced to cease operations and abandon its business.
In such event, Company shareholders could lose their entire investment.
    

New Product Development

     The Company's reading  instrumentation and associated disposables are under
development.  Such  development  is being  conducted  by the Company  using both
internal resources and outside contractors.  To date, the Company and certain of
its outside contractors have not met their development timetables and budget. No
assurance can be given that the Company's development timetable can be met, that
the budget for development will be maintained,  or that development efforts will
be successful.

<PAGE>

Uncertainty of Market Acceptance

   
     The  commercial  success of the  Company's  products will depend upon their
acceptance  by the  medical  community  and  third-party  payors as  useful  and
cost-effective.  Market  acceptance will depend upon several factors,  including
the establishment of the utility and  cost-effectiveness of the Company's tests,
the receipt of regulatory  clearances in the United States and elsewhere and the
availability of third-party  reimbursement.  The availability of NP test systems
for a wide  variety  of tests has been  limited  to date.  The  Company  is thus
targeting an emerging market. Diagnostic tests similar to those developed by the
Company are generally performed by a central laboratory at a hospital or clinic.
The approval of the purchase of diagnostic  equipment by a hospital is generally
controlled  by its  central  laboratory.  The  Company  expects  there  will  be
resistance  by  central  laboratories  to  yield  control  of  tests  they  have
previously  performed.  The Company will also have to  demonstrate to physicians
that its  diagnostic  products  perform as  intended,  meaning that the level of
accuracy and precision  attained by the Company's products must be comparable to
test  results  achieved  by  the  central  laboratory  systems.  Failure  of the
Company's  products to achieve market  acceptance or third-party  payor approval
would have a material adverse effect on the Company.
    

Lack of Marketing Experience

     The Company has had no  experience  in  marketing  its system.  The Company
believes  that the ED market is focused  enough that a small sales and marketing
force can produce significant  results,  however,  there is no guaranty that the
Company's sales and marketing plans will succeed.

Lack of FDA Product Approval

     The Company's products will be regulated as medical devices by the Food and
Drug Administration ("FDA") under the Federal Food, Drug, and Cosmetic Act ("FDC
Act"),   and   as   such   require   premarket   regulatory   clearance   before
commercialization  in the United  States.  The Company  believes that  premarket
clearance  can be obtained for its  systems,  except for a few tests the Company
may  introduce  at a  later  time,  through  submission  of a  510(K)  premarket
notification  ("510(K)  Notification")  demonstrating the product's  substantial
equivalence to another device legally marketed  pursuant to 510(K)  Notification
clearance. The Company will have to perform in-house clinical trials designed to
produce the data necessary to  demonstrate  the  substantial  equivalence of its
instrument and tests.  Although 510(K)  submissions are supposed to be completed
by the FDA within 90 days of submission,  there can be no assurance the FDA will
approve the Company's initial system pursuant to a 510(K) Notification, or do so
in a timely manner,  and therefore there can be no assurance of when the Company
will be able to  introduce  its  initial  system in the  United  States.  If the
Company cannot  establish to the  satisfaction  of the FDA that its products are
substantially  equivalent,  the  Company  will have to seek  premarket  approval
("PMA") of its system,  requiring  submission of a PMA application  supported by
extensive data to prove safety and efficacy. If a PMA is required,  introduction
of the initial system would likely be significantly  delayed, which could have a
material  adverse  effect  on the  Company.  By  regulation,  FDA  review of PMA
applications is required within 180 days of its acceptance for filing;  however,
reviews more often occur over a significantly  protracted period,  usually 12 to
18 months, and a number of products have never been cleared.

Limited Manufacturing and Production Experience

     To be successful  the Company must  manufacture  its products in compliance
with regulatory  requirements,  in sufficient  quantities and on a timely basis,
while  maintaining  product  quality and  acceptable  manufacturing  costs.  The
Company  will have to establish a  manufacturing  facility,  or contract  with a
third party for manufacturing,  which is registered with the FDA.  Production of
the Company's  disposables requires the placement of antibodies or other binding
reagents on metalized grating surfaces. The chemical and physical conditions for
coating are substantially  equivalent to those used to produce other solid state
binding assays.  Although the Company believes that its production  methods will
be effective for manufacturing  its disposables,  there can be no assurance that
the methods  will be  applicable  to all the tests it expects to develop or that
the Company will be able to manufacture  accurate and reliable products in large
commercial  quantities on a timely basis and at an acceptable cost. Inability to
manufacture a full range of diagnostic tests would limit the Company's access to
its intended market.

<PAGE>

Competition
   
     The diagnostic testing market is highly competitive.  As NP testing markets
expand,  the Company expects that  manufacturers  of central and STAT laboratory
testing  equipment  will compete to maintain  their revenue and market share and
that new NP testing products will be developed.  All of the industry leaders and
many of the other  companies  participating  in this market  have  substantially
greater resources than the resources  available to the Company,  including,  but
not limited to, financial resources and skilled personnel.
    

Technological Obsolescence

     The Company  operates in a market  characterized  by rapid and  significant
technological  change. While the Company is not aware of any developments in the
medical  industry which would render the Company's  current or planned  products
less   competitive   or  obsolete,   there  can  be  no  assurance  that  future
technological  changes or the  development  of new or  competitive  products  by
others will not do so. To remain competitive,  the Company must continually make
substantial expenditures for development of both equipment and disposables.

Obtaining Antibodies and Chemistries

     Many of the chemistries that will be necessary for the Company's diagnostic
system must be obtained  through  commercial  suppliers  or  agreements  for the
licensing of such  chemistries.  Although the Company believes it can obtain the
necessary  chemistries,  there can be no assurance that the Company will be able
to make  satisfactory  arrangements  to  provide  its  customers  with as wide a
variety of products as they might  desire.  The lace of a  sufficient  number of
chemistries  would greatly limit the Company's  ability to market its diagnostic
system.

Patent Protection

     No  assurance  can  be  given  that  other   companies   will  not  develop
technologies  substantially  equivalent  to  those  owned or to be  acquired  or
developed  by the  Company  or that  the  Company  will be able to  protect  its
proprietary  technology.  The  Company is not aware of any issued  patents  that
would  prohibit  the use of any  technology  the  Company  currently  has  under
development.  However,  patents  may  exist  or  issue  in the  future  to other
companies covering elements of the Company's systems.  The existence or issuance
of such  patents  may require  the  Company to make  significant  changes in the
design of its systems or operational  plans.  Although the Company believes that
its proposed products will not infringe patent rights of others, there can be no
assurance  that such  infringement  does not, or will not, exist with respect to
the  completed  product.  The Company has not  conducted an  independent  patent
search or  evaluation  with  respect  to the SPR  technology.  Ares-Serono,  the
licensor to the Company of its basic SPR  technology,  has made no warranties as
to the  enforceability of any of its patents or the commercial  potential of the
technology.  Although  Ares-Serono has the obligation to defend the patents they
have licensed to the Company,  Quantech will be  responsible  for the defense of
any patents issued to it. Cost of defending patents can be substantial.

Dependence on the Ares-Serono License

     The  Company  is  dependent  upon  the  worldwide  exclusive  license  (the
"License")  it  acquired  from  Ares-Serono  to  certain  patents,   proprietary
information and associated hardware (e.g. molds, test rigs,  prototypes) related
to the SPR technology.  The Ares-Serono  affiliated  companies (the "Ares-Serono
Group"), based in Switzerland,  comprise a multinational organization engaged in
the  development  and  marketing  of  ethical   pharmaceuticals  and  diagnostic
products,  primarily in the field of human fertility,  human growth,  immunology
and  virology.  The  License  calls for an  ongoing  royalty of 6 percent on all
products  utilizing  the SPR  technology  which are sold by the Company.  If the
Company sublicenses the technology, the Company will pay a royalty of 15 percent
of all  revenues  received by the Company  under any  sublicense.  To date,  the
Company has paid  $850,000.  If the  payments  of the 6 percent  royalty and the

<PAGE>

sublicense  royalty fail to reach at least  $1,000,000  by December 31, 1997, an
additional  payment of $150,000 by December 31, 1997 will be  required.  If such
payment  is not  made,  Ares-Serono  has  the  right  to  cause a  reversion  to
Ares-Serono  of a  royalty-free  license,  thereby  depriving the Company of its
exclusive rights under the License. The obligations of Quantech to pay royalties
terminate when the total royalty  payments  (excluding any sublicense  royalties
paid through July 1, 1996) reach a gross amount of $18 million. After such date,
Quantech's rights in the licensed SPR technology  continue in perpetuity with no
further obligations to Ares-Serono.

     Ares-Serono  specifically  reserved,  and did not license to Quantech,  any
rights with or otherwise  integrated  with certain  fluorescence  capillary fill
device  technology  (the "FCFD  Technology").  The  Company  believes  that such
limitation does not materially  impact the value of the License given Quantech's
current plan of  commercialization.  In addition,  the License is subject to the
contingent right of PA Technology,  a U.K. corporation,  to request a grant of a
non-exclusive  royalty-free  license  to  exploit  certain  rights  in  the  SPR
technology for applications outside the field of the commercial interests of the
Company. Finally,  Ares-Serono has retained the right to further develop the SPR
technology,  provided,  however,  that any  products  commercialized  from  such
development  may only be sold through  Ares-Serono  under its name.  Quantech is
unaware of any attempts by Ares-Serono to further develop the SPR technology.

Government Regulation

     If the  Company  becomes a provider of health  care  diagnostic  devices as
intended,  the Company will be subject to laws and  regulations  administered by
federal,  State and foreign  governments.  The degree of regulation and areas of
concern differ in each country or region. The Company will be required to comply
with  regulations  regarding  product approval and performance and, in addition,
regulations  concerning  electronic  devices.  The industry in which the Company
expects to operate is subject to frequent regulatory changes and there can be no
assurance that the Company will be able to comply with  applicable  regulations.
In the event of noncompliance, the Company may be unable to market any products.

   
Changes in Management

     R.H.  Joseph Shaw resigned as the Company's  chairman,  president and chief
executive officer.  Mr. Shaw remains a consultant to the Company. The Company is
seeking a new chief  executive  officer with a strong  background in operating a
commercial  diagnostics company. In the interim,  Robert Case, a director of the
Company, has been elected to serve as the chief executive officer of the Company
on a  part-time  basis.  James F. Lyons was elected  chairman  of the  Company's
board.  The Company also recently  accepted the resignation of Michael P. Nagel,
formerly  Director of Sales and  Marketing.  In addition  to the  departures  of
Messrs. Shaw and Nagel, the Company completed a workforce reduction bringing the
total number of full-time employees to 14.
    

Possibility of Exposure to Product Liability Claims

     The Company could be exposed to risk of product  liability  claims or other
lawsuits in the event of incorrect  diagnosis  utilizing  the SPR  equipment and
disposables  developed  by the  Company.  Although  the  Company  will  evaluate
obtaining liability insurance when the products come to market,  there can be no
assurance  that the Company will be able to obtain or maintain such insurance or
that the  Company  will not be  subject  to claims  in  excess of its  insurance
coverage.



<PAGE>

Absence of Dividends

     The Company has not declared or paid any cash dividends on its Common Stock
since its inception and the Board of Directors  presently  intends to retain all
earnings  for  use by  the  Company  for  the  foreseeable  future.  Any  future
determination  as to  declaration  and payment of dividends  will be made at the
discretion  of the Board of Directors  and will depend upon a number of factors,
including,  among others,  earnings of the Company,  the operating and financial
condition  of the  Company,  the  Company's  capital  requirements,  and general
business conditions.

Shares Eligible for Future Sale

   
     Including  the Shares  available  pursuant to this  Prospectus,  all of the
Company's  outstanding  stock may be sold in the  public  market.  In  addition,
11,940,103 of a total of 19,555,403 shares that may be obtained upon exercise of
outstanding  options and warrants are also included for resale  pursuant to this
Prospectus. The sale of a substantial number of the shares available for sale or
shares  underlying  options and warrants could adversely effect the market price
and liquidity of the Company's securities.
    

Limited Market for Securities

     There is a limited trading market for the Company's Common Stock,  which is
not listed on any stock  exchange or Nasdaq.  Although  trading in the Company's
Common Stock does occur on a consistent  basis,  the volume of shares traded has
been sporadic. There can be no assurance that an established trading market will
develop,  the  current  market  will be  maintained  or a liquid  market for the
Company's Common Stock will be available in the future.


                       PRINCIPAL AND SELLING SHAREHOLDERS

     Set forth  below are the names of:  (a)  persons  who are known to own more
than 5% of the Company's Common Stock;  (b) each executive  officer named in the
Summary  Compensation table; (c) each director of the Company; (d) all directors
and executive officers as a group; and (e) Selling  Shareholders.  The following
table  sets forth as of the date of the  Prospectus  beneficially  owned  shares
which include any shares that may be acquired within 60 days of the date of this
Prospectus  upon exercise of options or warrants,  the number of Shares  offered
hereby and the percentage of the outstanding  Common Stock to be owned if all of
the Shares registered hereunder are sold by the Selling Shareholders.

<TABLE>
<CAPTION>

   
                                                                                                     % Of
                                                      Number of Shares                No.           Shares
                                                     Beneficially Owned              Shares          Owned
                                                                    Warrant         Offered          After
                    Name                             Shares         Shares          Hereby        Offering
- ----------------------------------------------
<S>                                               <C>              <C>             <C>              <C>   

Ted & Mary Adams                                    25,000                           25,000            *
Theodore P. Adams                                   40,000           10,000          50,000            *
American Heritage Fund                                              250,000         250,000            *
Gerald L. Anderson                                  25,000                           25,000            *
Roy Anderson Jr.                                   200,000           50,000         250,000            *
Roy Anderson III                                   200,000           50,000         250,000            *
Gregory & Ann Anklam                                40,000           10,000          50,000            *
Menesa Anstalt(1)                                   50,000                           50,000            *
Meleah T. & David M. Arnold                        400,000          100,000         100,000          1.0%
J. Marc Ashton                                      40,000           10,000          50,000            *
Bernard C. Baier                                    50,000                           50,000            *
John G. Ballenger                                  200,000           50,000         250,000            *
Bank Heusser & Co. LTD(2)                          400,000          100,000         100,000          1.0%
W. William & Colette M. Bednarczyk                 125,000                          125,000            *
Richard T. Bennett                                  50,000                           50,000            *
Denis Berger                                                        250,000         250,000            *
Nicolas C. Bluhm                                   360,000          115,000         325,000            *
Jeffrey A. & Brenda L. Bowen                        50,000                           50,000            *
Donald A. Brattain                                 450,000           50,000         500,000          1.0%
Courtney W. Brown                                  210,664           10,000          50,000            *
Paul R. Braun                                       33,335                           33,335            *
Richard M. Brown                                    25,000                           25,000            *
Ralph D. Burgess Jr.                                50,000                           50,000            *
Timothy H. Burton                                   50,000                           50,000            *
Anthony Carideo                                     40,000           10,000          50,000            *
Robert Case(3)(22)                                 908,334                          908,334          1.9%
Fred & Wendy Caslavka                               10,000                           10,000            *
Joseph B. Catarious                                200,000           50,000          50,000            *
Lee S. Chapman                                     538,000           25,000         235,000          1.2%
Martin Chelstrom                                    10,000                           10,000            *
Christianson Investment Co. LP(4)                  500,000          100,000         200,000          1.2%
Ann M. Christianson                                 19,750            4,937           4,937            *
Lynn A. Christianson                                19,750            4,937           4,937            *
Warren G. Christianson                             800,036          120,378         470,378          1.9%
Warren T. A. Christianson                           19,750            4,937           4,937            *
Dual B. & Adelle Cooper                             10,000                           10,000            *
Dave Cowley Pension Trust                           50,000                           50,000            *
Thomas A. Cullinan                                  25,000                           25,000            *
Francisco E. dela Rosa Jr.                          17,000                           17,000            *
Robert W. & Rita M. deWerd                          48,000           12,000          60,000            *
Glenn Diamond                                    1,115,037          600,000         600,000          3.5%
Michael H. Diemer                                   50,000                           50,000            *
John P. & Emily W. Dirksen                          80,000           20,000         100,000            *
Arthur T. Donaldson                                 25,000                           25,000            *
DRAFTCO                                            200,000           50,000         100,000            *
Neil Durhman                                                        200,000         200,000            *
Paul Ehlen                                          36,670            5,000          41,670            *
Stanley G. & Carol R. Eilers                       958,000          190,000         390,000          2.3%
Engelkes-Abels Funeral Home Inc.(5)                 80,000           20,000         100,000            *
Equity Securities Trading Co., Inc.(6)                 -              2,000           2,000            *
James E. Ernst                                      17,500                           17,500            *
Weems Estelle(7)                                   560,000          450,000         450,000          2.1%
Robert J. Evans                                     40,000           10,000          50,000            *
Harvey Feldman                                      25,000                           25,000            *
Lee Felicetta                                       40,000           10,000          20,000            *
John E. Feltl                                          -              4,000           4,000            *
Founding Partners Limited Partnership II(8)        200,000                          200,000            *
Carol M. Freeman                                    19,750            4,937           4,937            *
Gregory G. Freitag                               1,135,500(9)(22)   100,000         100,000          2.3%
Robert W. Jr.  & Patricia T. Gaines                100,000                          100,000            *
Robert D. Gearou                                    50,000                           50,000            *
Robert L. Gearou                                   250,000           62,500         112,500            *
Thomas W. Gearou                                   250,000           50,000         300,000            *
Marvin A. Ginsburg                                  40,000           10,000          50,000            *
Michael J. Glass                                    16,670                           16,670            *
Ronald L. Glassman                                  50,000                           50,000            *
Glymar Inc.                                         40,000           10,000          50,000            *
Mark Goldsteen                                     400,000          100,000         500,000          1.0%
Franklin N. Groves IRA                               25,000                           25,000           *
Gummow Investments(10)                               50,000                           50,000           *
Troy Gummow                                          50,000                           50,000           *
Warren Guy & Lonnie K. Gummow                        50,000                           50,000           *
James W. Hansen                                      50,000                           50,000           *
Thomas Harkness                                     100,000           50,000         150,000           *
Craig Hartsburg                                      25,000                           25,000           *
Bill R. Hay                                          80,000           15,000          95,000           *
Timothy Heaney                                       20,000            5,000          25,000           *
Timothy Heaney IRA                                    8,335                            8,335           *
Heartland Limited Partnership I(11)                 750,000                          750,000         1.6%
Thomas Craig Hense                                   50,000                           50,000           *
Julie A. Higgins                                     19,750            4,937           4,937           *
Bruce Hubbard                                        32,000            8,000          40,000           *
Richard G. & Diane L. Hubers                         20,000                           20,000           *
H. K. Financial Corp                              1,420,664          100,000         500,000         3.2%
Hynan Real Estate Partnership                        25,000                           25,000           *
Industricorp & Co. Inc.(12)                         127,600           44,400          51,300           *
Intermed Anstalt                                    275,000           50,000         100,000           *
Charles A. Jacob                                     20,000                           20,000           *
Stanley J. Johnson                                  250,000           75,000         125,000           *
Theodore Johnson                                    100,000           25,000         125,000           *
Wesley E. Johnson Jr.                                65,000           10,000          35,000           *
James C. Jordan                                      25,000                           25,000           *
E. Elmer & E. Joyce Jutila                           40,000           10,000          50,000           *
Jon E. Jutila                                        40,000           10,000          50,000           *
Nasser J. Kazeminy                                   85,000                           85,000           *
Bernard M. S. Kegan                                  40,000           10,000          50,000           *
Michael S. Kelly                                       -               4,000           4,000           *
Kessler Ashler Group Limited Partnership            800,000          200,000       1,000,000         2.7%
Kurt King DDS, IRA                                  100,000           25,000         125,000           *
Steven G. King                                      100,000           25,000          85,000           *
John G. Kinnard & Company Inc.(13)                     -           3,078,500       3,078,500         6.0%
Brandon Koress                                      116,670           25,000         141,670           *
Mitchell Krieger                                    175,000           37,500         112,500           *
David J. & Kathryn J. Kruskopf                       40,000           10,000          50,000           *
Martin Lackner                                      116,670           25,000         141,670           *
Lakewood Ortho Clinic-Mark Mills                     40,000           10,000          50,000           *
Dennis J. LaValle                                 1,000,360          175,000         508,985         2.1%
Bruce A. Lawin                                       40,000           10,000          50,000           *
Thomas F. Leahy                                     100,000                          100,000           *
Cheri E. Lefebvre                                    10,000                           10,000           *
Lopresti Gabbay & Associates Inc.                   400,000                          400,000           *
C. S. Lozinski                                       60,000           15,000          15,000           *
Roger Lucas                                         100,000           25,000         125,000           *
Wayne K. Lund                                       792,000          150,000         190,000         2.0%
James F. Lyons                                      783,334(14)(22)   50,000         300,000         1.7%
James F. Lyons & Eleanor Lyons                       50,000                           50,000           *
Plato Mavroulis                                     100,000           25,000         125,000           *
Lyle H. Maschoff                                     25,000                           25,000           *
Kenneth Maus                                         50,000                           50,000           *
Victor Mavar                                        100,000           25,000         125,000           *
David Metz                                           50,000           12,500          62,500           *
Joseph Moorbroek                                     60,000           15,000          75,000           *
Sheliah Mulvaney                                     16,665                           16,665           *
James S. Murphy                                      80,000           20,000         100,000           *
Andrea McCallister O'Connell                        127,664           12,500          87,500           *
Robert R. McKiel                                    881,330(15)                      830,841         1.8%
H. Vincent O'Connell                                345,864           32,500         182,500           *
Steve O'Hara                                         40,000           10,000          50,000           *
Jay Osman                                             5,000                            5,000           *
John & Delores Owensby                              340,000           90,000         190,000           *
Deming L. Payne                                     260,000           90,000         150,000           *
Richard W. Perkins                                  683,334(16)       50,000         350,000         1.4%
Thomas J. Pierce                                     40,000           10,000          50,000           *
William W. Prain                                    100,000           25,000          25,000           *
Charlie H. Pulley                                   342,000           75,000         217,000           *
Arthur Querfeld                                      40,000                           40,000           *
Mary J. Rasley                                       19,750            4,937           4,937           *
Willard Charles Rehbein                             400,000          150,000         150,000         1.1%
Victor P. Reim                                       50,000                           50,000           *
Ben Reuben                                           25,000                           25,000           *
River Edge Partners, Inc.(17)                       300,000          100,000         400,000           *
Kenneth S. Roberts                                   50,000                           50,000           *
Richard Rog                                          25,000                           25,000           *
Douglas Schmid                                       25,000                           25,000           *
Robert A. & Lois R. Schmiege                        100,000           37,500          37,500           *
Schneider Securities Inc.                                             17,500          17,500           *
Thomas J. Schrade                                   100,000                          100,000           *
James R. Schroeder                                   25,000                           25,000           *
John P. & Gloria E. Schweich                         50,000           12,500          25,000           *
Sekhavat Ltd. Partnership(18)                       560,000          190,000         350,000         1.6%
Byron G. Shaffer                                    335,000                          335,000           *
Gerald J. Shink                                      50,000                           50,000           *
Patrick M.  Sidders                                  72,136            6,000          36,000           *
Ronald & Catherine M. Silver                         50,000                           50,000           *
Terryl Sinko                                         50,000                           50,000           *
Jeannette A. & John E. Slaughter                     25,000                           25,000           *
Allan P.  Steffes                                   100,000            25,000        125,000           *
Thomas E. Steinhaus                                  50,000                           50,000           *
Michael Stone                                          -                1,000          1,000           *
Ross Strehlow                                        20,000                           20,000           *
Edward E. Strickland                                733,334(19)(23)    50,000        250,000         1.7%
Strickland Family Limited Partnership               100,000(19)(23)                  100,000           *
Douglas V. & Kathleen L. Swanson                     25,000                           25,000           *
William R. & Catherine A. Swanson                    40,000            10,000         50,000           *
Curtis R. Swenson                                    25,000                           25,000           *
James W. Swenson                                    200,400            50,100        250,500           *
James E. Tarr                                        25,000                           25,000           *
David M. & Susan M. Thymian                         508,000            50,500        102,500         1.2%
Elizabeth J. Tonne                                   50,000                           50,000           *
John M. Tonne                                        50,000                           50,000           *
Larry & Gayla Torguson                               40,000            10,000         50,000           *
Marlin F. Torguson                                1,000,000           275,000        875,000         2.6%
Ben Trainer                                         255,000            75,000        130,000           *
Charles E. Underbrink                               325,000           125,000        450,000           *
Greg & Patricia Vogelpohl                            35,000                           35,000           *
Randall S.& Nancy Brostrom Vollertson                17,500                           17,500           *
Chris Warren                                                          100,000        100,000           *
Larry Weaver(20)                                      5,861           250,000        250,000           *
George Vitalis(21)                                   61,000           250,000        250,000           *
Paul Walker                                          25,000                           25,000           *
Willard Weikle                                       45,000                           45,000           *
Kevin E. & Delana S. Were                            17,000                           17,000           *
Frank W. Worms                                       85,000                           85,000           *
Alvin Zelickson                                      50,000            12,500         62,500           *
Richard J. Zentgraf                                  50,000                           50,000           *
All directors and executive officers as a
Group                                             5,275,166(23)       250,000      3,127,103         9.9%
(6 persons)
- -------------------------------------
*     Less than 1.0%.
</TABLE>
    

   
(1)   The director of Mensa Anstalt and intermed Anstalt is Georg Vogt.
(2)   The president of Bank Heusser & Co. is Max Cotting.
(3)   Includes  options  and  warrants to  purchase  908,334  shares  that are  
      currently  exercisable  or exercisable within 60 days.
(4)   The  principal of Christianson Investment Co. LP, a family  investment
      partnership  of  Ted Christianson.
(5)   The president and owner of Engelkes-Able Funeral Home Inc. is Tom Vertin.
(6)   Equity  Security  Trading Co., Inc. is an investment  banking firm and 
      NASD member owned by Laurence Zipkin and Nathan Newman.
(7)   Mr. Estelle was the Company's former Chairman of the Board.
(8)   The  principles  of Founding  Partners II, an investment  partnership, are
      David Henderson and Donald Brattain.
(9)   Includes  options and  warrants to purchase  1,130,000  shares  that are 
      currently  exercisable or exercisable within 60 days.  Mr. Freitag is the
      Company's CFO and Chief Operating Officer.
(10)  The principles of Gummow Investments are Warren Guy Gummow and Lonnie K.
      Gummow.
(11)  Heartland Limited Partnership is an investment partnership.
(12)  Industricorp & Co. Inc. is a nominee holder for Union Bank & Trust.
(13)  John G. Kinnard and Company,  Incorporated is the Company's Investment 
      Banker and a subsidiary of a publicly-traded company, Kinnard Investments,
      Inc.
(14)  Includes  options and  warrants to  purchase  533,334  shares  that are  
      currently  exercisable  or exercisable within 60 days.  Mr. Lyons is 
      Chairman of the Board of the Company.
(15)  Includes 830,841 shares issuable upon exercise of warrants.  Mr. McKiel 
      is the Company's  Executive V.P. of Research and Development.
(16)  Includes  options to purchase  383,334  shares that are  currently
      exercisable.  Mr.  Perkins is a director of the Company.
(17)  The president of River Edge Partners Inc. is Joseph Ciffilillo.
(18)  The general partner of Sekhavat Ltd. Partnership is Abbass Sekhavat.
(19)  Includes options and warrants to purchase 458,334 shares that are 
      currently exercisable  or  exercisable  within 60 days.  Excludes  
      100,000 shares and warrants to purchase  75,000 shares held by the  
      Strickland  Family Limited Partnership of which entity Mr. Strickland is 
      a general partner. Mr.Strickland is a director of the Company.
(20)  Dr. Weaver was a former director of the Company.
(21)  Mr. Vitalis was a former director and CEO of the Company.
(22)  Does  not  include notes convertible at 80% of the per  share  price  of
      Quantech's  next transaction in excess of $5,000,000  in the  principal
      amounts of $25,000, $10,000, $50,000, $25,000 and $25,000 held by Messrs.
      Case, Freitag, Lyons and Strickland and the Strickland  Family Limited
      Partnership, respectively.
(23)  Includes  options and warrants to  purchase  4,244,177  shares  that are
      currently exercisable or exercisable within 60 days. Also includes 100,000
      shares and warrants to purchase 75,000 shares held by the Strickland
      Family Limited Partnership of which entity Mr. Strickland is a general 
      partner.
    


<PAGE>


                            DESCRIPTION OF SECURITIES

     The following  description  of the Company's  capital stock is qualified in
its  entirety  by  reference  to the  Company's  Articles of  Incorporation,  as
amended, its Bylaws, and the Minnesota Business Corporation Act (the "MBCA").

General

     The  aggregate  number of shares the Company has the  authority to issue is
120 million,  par value $.01 per share,  consisting of 90,000,000  common shares
and  30,000,000  undesignated  shares.  The Board of Directors of the Company is
authorized to establish from the undesignated  shares, by resolution adopted and
filed in the manner provided by law, one or more classes or series of shares, to
designate  each such class or series  (which may  include  but is not limited to
designation as additional  common  shares),  and to fix the relative  rights and
preferences  of each such class or series.  None of the  holders of any class or
series of the  Company's  capital  stock  have  preemptive  rights or a right to
cumulative voting.

Common Stock

   
     As of the date of this  Memorandum,  there  were  48,040,759  shares of the
Company's Common Stock issued and outstanding.  The Board of Directors may issue
additional  shares of Common Stock  without the consent of the holders of Common
Stock.
    

     Each  outstanding  share of Common  Stock is entitled to one vote except as
may be otherwise required under the terms of the MBCA. All outstanding shares of
Common Stock are fully paid and non-assessable.

     Holders of Common Stock are  entitled to receive  such  dividends as may be
declared by the directors out of funds legally available therefor,  and to share
pro rata in any  distributions  to holders of Common Stock upon  liquidation  or
otherwise. However, the Company has not paid cash dividends on its Common Stock,
and does not expect to pay such dividends in the foreseeable future.

     Under the provisions of the MBCA, which governs the actions of the Company,
an amendment to the Articles of  Incorporation  of the Company  generally may be
adopted by the affirmative vote of the holders of a majority of the voting power
of the shares present and entitled to vote at a  shareholders'  meeting at which
an amendment is proposed.  Under the statute,  a majority of the voting power of
the  shares  entitled  to  vote at a  meeting  is  generally  a  quorum  for the
transaction of business.  Accordingly,  it is possible that the affirmative vote
of shares in excess of 25 percent of the  outstanding  shares could authorize an
amendment to the Company's  Articles of  Incorporation.  Under the Statute,  the
affirmative  vote of the holders of a majority of the voting power of all shares
entitled to vote is necessary to approve a plan of merger, a plan of exchange, a
sale  of  all  or  substantially  all  of the  assets  of  the  Company,  or its
dissolution.



<PAGE>


Options and Warrants

   
     The Company has granted  options and warrants to purchase up to  19,555,403
shares of Common Stock to officers, directors, scientific advisors, consultants,
investors, and financial advisors.
    

Transfer Agent

     StockTrans Inc., Seven East Lancaster Avenue,  Ardmore,  PA is the transfer
agent for the Common Stock.


                              PLAN OF DISTRIBUTION

     All or a portion of the Shares offered by the Selling  Shareholders  hereby
may be  sold  from  time to time by the  Selling  shareholders  or by  pledgees,
donees,  transferees or other successors in interest.  Such sales may be made in
the over-the-counter  market or otherwise at prices and at terms then prevailing
or at  prices  related  to the  then  current  market  price,  or in  negotiated
transactions.  The Shares may be sold by one or more of the following means: (a)
ordinary  brokerage or market making  transactions and transactions in which the
broker or dealer  solicits  purchasers;  (b) block trades in which the broker or
dealer so engaged  will attempt to sell the Shares as agent but may position and
resell a portion of the block as principal to facilitate  the  transaction;  and
(c)  purchases by a broker or dealer as principal  and resales by such broker or
dealer for its account pursuant to this Prospectus.  In effecting sales, brokers
or dealers engaged by the Selling  Shareholders may arrange for other brokers or
dealers to participate. Brokers or dealers will receive commissions or discounts
from the Selling  Shareholders in amounts to be negotiated  immediately prior to
the  sales.  Such  brokers  or dealers  and any other  participating  brokers or
dealers may be deemed to be "underwriters"  within the meaning of the Securities
Act of 1933,  as amended,  in  connection  with such  sales.  In  addition,  any
securities  covered by this  Prospectus  which qualify for sale pursuant to Rule
144  under the Act may be sold  under  Rule 144  rather  than  pursuant  to this
Prospectus.

                                TABLE OF CONTENTS

Available Information........................................................2
Documents Incorporated By Reference..........................................2
Company Summary..............................................................3
Risk Factors.................................................................4
Principal and Selling Shareholders...........................................8
Description of Securities...................................................13
Plan of Distribution........................................................14



<PAGE>



                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14.  Other Expenses of Issuance and Distribution

The estimated expenses in connection with this offering are as follows:

    Securities and Exchange Commission Filing Fee.....................$14,259
    Legal Fees and Expenses........................ ..................$ 7,500
    Accounting Fees and Expenses......................................$ 7,500
    Printing..........................................................$ 5,000
    Miscellaneous.....................................................$   741
         Total Expenses...............................................$35,000


Item 15.  Indemnification of Directors and Officers.

     Section 302A.521 of the Minnesota Business  Corporation Act provides that a
corporation  shall  indemnify  any person who was or is  threatened to be made a
party to any proceeding by reason of the former or present official  capacity of
such  person ,  against  judgments,  penalties  and  fines,  including,  without
limitation  , excise  taxes  assessed  against  such person  with  respect to an
employee benefit plan, settlements and reasonable expenses, including attorneys'
fees  and  disbursements,  incurred  by  such  person  in  connection  with  the
proceeding,  if, with respect to the acts or omissions of such person complained
of  in  the  proceeding  such  person  has  not  been   indemnified  by  another
organization or employee  benefit plan for the same expenses with respect to the
same acts or  omissions,  acted in good faith,  received  no  improper  personal
benefit and Section 302A.255 (which pertains to director conflicts of interest),
if applicable,  has been satisfied; in the case of a criminal proceeding, had no
reasonable cause to believe the conduct was unlawful; and in the case of acts or
omissions by a person in their official capacity for the corporation, reasonably
believed that the conduct was in the best  interests of the  corporation,  or in
the  case  of  acts  or  omissions  by  persons  in  their  capacity  for  other
organizations,  reasonably believed that the conduct was not opposed to the best
interests of the corporation.

     The Minnesota Business Corporation Act also permits Minnesota  corporations
in their Articles of Incorporation to limit or eliminate  personal  liability of
directors to the corporation or its shareholders for monetary damages for breach
of fiduciary duty;  however,  for bids any limitation or elimination of director
liability  for (i) a breach  of the  director's  duty of  loyalty,  (ii) acts or
omissions not in good faith or that involve intentional  misconduct or a knowing
violation of law, (iii) corporate  distributions  which are either illegal or in
contravention of restrictions in the Articles,  Bylaws or any agreement to which
the corporation is a party,  (iv) violations of Minnesota  securities  laws, (v)
any transaction from which the director derived an improper personal benefit, or
(vi) any act or omission  occurring prior to the effective date of the provision
in the corporation's Articles eliminating or limiting liability.

     Article 8 of the Registrant's Articles of Incorporation reads as follows:

     "To the fullest extend permitted by Chapter 302A,  Minnesota  Statutes,  as
the same  exists or may  hereafter  be amended,  a director of this  corporation
shall  not be  personally  liable to the  corporation  or its  shareholders  for
monetary damages for breach of fiduciary duty as a director."

     The Registrant's  Bylaws provide for the  indemnification of its directors,
officers,  employees and agents in accordance  with,  and to the fullest  extent
permitted by, Section  302A.521 of the Minnesota  Business  Corporation  Act, as
amended from time to time.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted pursuant to the foregoing  provisions,  the Company has
been informed that, in the opinion of the Commission,  such  indemnification  is
against public policy as expressed in such Act and is therefore unenforceable.

Item 16.  Exhibits.

     See Exhibit Index on page following signatures.


<PAGE>

Item 17.  Undertakings.

(a) The undersigned Registrant hereby undertakes:

    (1) To file,  during  any period in which it offers or sells  securities,  a
post-effective amendment to this registration statement to:

         (i)      Include any  prospectus  required  by section  10(a)(3) of the
                  Securities  Act; 
        (ii)      Reflect in the  prospectus  any facts or
                  events  arising after the effective  date of the  Registration
                  Statement  (or  the  most  recent   post-effective   amendment
                  thereof) which, individually or in the aggregate, represents a
                  fundamental  change  in  the  information  set  forth  in  the
                  registration statement; and
         (iii)    Include any additional  material  information  with respect to
                  the  plan of  distribution  not  previously  disclosed  in the
                  Registration   Statement  or  any  material   change  to  such
                  information in the Registration Statement.

                  Provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do
                  not apply if the  information  required  to be  included  in a
                  post-effective  amendment by those  paragraphs is contained in
                  periodic reports file by the Registrant pursuant to section 13
                  or section 15(d) of the  Securities  Exchange Act of 1934 that
                  are incorporated by reference in the Registration Statement.

    (2) That for  determining  liability  under the Securities Act of 1933, each
such post-effective amendment shall be deemed to be a new registration statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

    (3) To remove from  registration by means of a post-effective  amendment any
of the securities that remain unsold at the termination of the offering.


(b) Insofar as indemnification  for liabilities arising under the Securities Act
of 1933 may be permitted to directors,  officers and controlling  persons of the
Registrant pursuant to the foregoing  provisions,  or otherwise,  the Registrant
has been advised that in the opinion of the Securities  and Exchange  Commission
such indemnification is against public policy as expressed in the Securities Act
of  1933  and is,  therefore,  unenforceable.  In the  event  that a  claim  for
indemnification  against  such  liabilities  (other  than  the  payment  by  the
Registrant of expenses  incurred or paid by a director,  officer or  controlling
person of the  Registrant  in the  successful  defense  of any  action,  suit or
proceeding)  is  asserted by such  director,  officer or  controlling  person in
connection with the securities being registered,  the Registrant will, unless in
the opinion of its counsel the matter has been settled by controlling precedent,
submit  to a  court  of  appropriate  jurisdiction  the  question  whether  such
indemnification  by it is against  public policy as expressed in the  Securities
Act of 1933 and will be governed by the final adjudication of such issue.

(c)  The undersigned Registrant further undertakes that:

         (1) For purposes of determining  any liability under the Securities Act
    of 1933, the information  omitted from the form of prospectus  filed as part
    of this registration statement in reliance upon Rule 430A and contained in a
    form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or (4)
    or  497(h)  under  the  Securities  Act  shall be  deemed to be part of this
    registration statement as of the time it was declared effective.

         (2) For the purpose of determining  any liability  under the Securities
    Act  of  1933,  each  post-effective  amendment  that  contains  a  form  of
    prospectus  shall be deemed to be a new registration  statement  relating to
    the securities offered therein,  and the offering of such securities at that
    time shall be deemed to be the initial bona fide offering thereof.

(d) The  undersigned   Registrant   hereby  undertakes  that,  for  purposes  of
    determining  any liability  under the Securities Act of 1933, each filing of
    the Registrant's annual report pursuant to Section 13(a) or Section 15(d) of
    the Securities  Exchange Act of 1934 (and, where applicable,  each filing of
    an employee  benefit  plan's annual report  pursuant to Section 15(d) of the
    Securities  Exchange Act of 1934) that is  incorporated  by reference in the
    Registration  Statement shall be deemed to be a new  registration  statement
    relating  to the  securities  offered  therein,  and  the  offering  of such
    securities at that time shall be deemed to be the initial bona fide offering
    thereof.

<PAGE>



                                   SIGNATURES
   
     In accordance  with the  requirements  of the  Securities  Act of 1933, the
Registrant certifies that it has reasonable grounds to believe that it meets all
of the requirements for filing on Form S-3 and has duly caused this registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the City of St. Paul, State of Minnesota, on July 29, 1997.
    

   
                              Quantech Ltd.

                              By /s/ Gregory G. Freitag
                                 Gregory G. Freitag, Chief Financial Officer and
                                   Chief Operating Officer

    

   
                               POWER OF ATTORNEY

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Registration  Statement  has  been  signed  by  the  following  persons  in  the
capacities  and on the dates  indicated.  Each person  whose  signature  to this
Registration Statement appears below hereby constitutes and appoints Robert Case
and  Gregory  G.  Freitag,  and  each of them,  as his or her  true  and  lawful
attorney-in fact and agent, with full power and substitution,  to sign on his or
her behalf individually and in the capacity stated below and to perform any acts
necessary  to be done  in  order  to  file  all  amendments  and  post-effective
amendments  to this  Registration  Statement,  and any  and all  instruments  or
documents filed as part of or in connection with this Registration  Statement or
the  amendments  thereto,  and each of the  undersigned  does hereby  ratify and
confirm all that said  attorney-in-fact  and agent,  or his or her  substitutes,
shall do or cause to be done by virtue hereof.
    


   
Signatures                          Title


/s/ Robert Case                     Chief Executive Officer and Director
Robert Case

/s/ Robert R. McKiel*               Executive Vice President-Research and
Robert R. McKiel                    Development and Director

/s/ Gregory G. Freitag              Chief Financial Officer, Chief Operating
Gregory G. Freitag                  Officer and Secretary

/s/ James F. Lyons*                 Chairman of the Board
James F. Lyons

/s/ Richard W. Perkins*             Director
Richard W. Perkins

/s/ Edward E. Strickland*           Director
Edward E. Strickland


*Pursuant to Power of Attorney
     previously filed:              /s/ Gregory G. Freitag
                                    Gregory G. Freitag, Chief Financial Officer
                                                 and Chief Operating Officer

Dated: July 29, 1997
    




<PAGE>


   
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                                  QUANTECH LTD.
            EXHIBIT INDEX TO AMENDMENT NO. 3 TO FORM SB-2 ON FORM S-3

    

   
Exhibit
Number                                Description
2.1    Plan of Reorganization, dated November 24, 1992, by and among Quantech
       Ltd. and Spectrum Diagnostics S.p.A. (incorporated by reference to 
       Exhibit 2.1 of the Registrant's Registration Statement on Form S-4;
       Reg. No. 33-55356).
2.2    Amendment and Restatement Agreement and Plan of Merger dated January 20,
       1993 by and among Quantech Ltd., Spectrum Diagnostics S.p.A. and Spectrum
       Diagnostics Corp. (incorporated by reference to Exhibit 2.2 of the
       Registrant's Registration Statement on Form S-4; Reg. No. 33-55356).
3.1    Articles of Incorporation of Quantech Ltd., as amended to date.      *
3.2    Bylaws of Quantech Ltd. (incorporated by reference to Exhibit 3.2 of the
       Registrant's Registration Statement on Form S-4; Reg. No. 33-55356).
4.1    Form of Stock Certificate (incorporated by reference to Exhibit 4.1 of
       the Registrant's Registration Statement on Form S-4; Reg. No. 33-55356).
4.2    Form of Private Placement Warrant.                                    *
5.1    Opinion and Consent of Fredrikson & Byron, P.A.                       *
10.1   Lease for office at 1419 Energy Park Drive, St. Paul, MN 55108
       (incorporated by reference to Exhibit 10.1 of the Registrant's
       Form 10-KSB for the Year Ended June 30, 1995).
10.2   Option Agreement with Ares-Serono, as amended (including license)
       assigned to Quantech Ltd. pursuant to the Merger (incorporated by
       reference to Exhibit 10.2 of the Registrant's Registration Statement on
       Form S-4; Reg. No. 33-55356).
10.3   Employment Agreement with R.H. Joseph Shaw (incorporated by reference to
       Exhibit 10.3 of the Registrant's Form 10-KSB for the Year Ended June 30,
       1995).
10.4   Employment Agreement with Robert M. McKiel (incorporated by reference to
       Exhibit 10.4 of the Registrant's Form 10-KSB for the Year Ended June 30,
       1995).
10.5   Letter of amendment to Ares-Serono License (incorporated by reference to
       Exhibit 10.6 of the Registrant's Form 10-KSB for the Year Ended June 30,
       1995).
10.6   Stock Option to purchase 1,246,000 shares by R.H. Joseph Shaw
       (incorporated by reference to Exhibit 10.12 of the Registrant's Form
       10-KSB for the Year Ended June 30, 1995).
10.7   Warrant  to  purchase  830,841  shares  by  Robert  M.  McKiel
       (incorporated   by   reference   to   Exhibit   10.13  of  the
       Registrant's Form 10-KSB for the Year Ended June 30, 1995).
10.8   Employment Agreement with Gregory G. Freitag.                         *
10.9   Severance and Settlement Agreement and Mutual Release of All Claims with
       R.H. Joseph Shaw dated June 13, 1997.
22     Quantech has no subsidiaries.
23.1   Consent of Fredrikson & Byron, P.A. (included in Exhibit 5.1)
23.2   Consent of McGladrey & Pullen L.L.P.
24     Power of Attorney (included on signature page to Registration 
       Statement)                                                           *
* Previously filed.
    





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