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EXHIBIT 23.3
CONSENT OF INDEPENDENT ACCOUNTANTS
We hereby consent to the incorporation by reference in this Registration
Statement on Form S-4 of MKS Instruments, Inc. of our report dated January 28,
2000, relating to the financial statements, which appears in MKS Instruments,
Inc.'s 1999 Annual Report to Stockholders, which is incorporated by reference in
its Annual Report on Form 10-K for the year ended December 31, 1999. We also
consent to the incorporation by reference of our report dated January 28, 2000
relating to the financial statement schedule, which appears in such Annual
Report on Form 10-K. We also consent to the references to us under the headings
"Experts" and "Selected Financial Data" in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Boston, Massachusetts
November 8, 2000
