Exhibit 11
DETECTION SYSTEMS, INC.
COMPUTATION OF EARNINGS PER SHARE
(In thousands, except per share data)
Three Months Ended September 30, 2000 1999
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Net income $ 878 $1,501
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Weighted average number of shares 6,342 6,348
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Basic earnings per share $0.14 $0.24
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Shares attributable to deferred
compensation plans and stock
options and warrants 404 490
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Diluted earnings per share $0.13 $0.22
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Six Months Ended September 30, 2000 1999
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Net income $1,556 $2,922
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Weighted average number of shares 6,355 6,363
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Basic earnings per share $0.25 $0.46
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Shares attributable to deferred
compensation plans and stock
options and warrants 405 476
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Diluted earnings per share $0.23 $0.43
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