Contact: Mark J. Plush
Vice President and CFO
Keithley Instruments, Inc.
[email protected]

Reader Inquiries: (888) 534-8453

Cleveland, Ohio - December 6, 2002 - Keithley Instruments, Inc. (NYSE:KEI), a leader in solutions for emerging measurement needs, today announced its regular quarterly cash dividend of $0.0375 per common share. The dividend is payable December 31, 2002, to shareholders of record at the close of business on December 17, 2002.

Keithley Instruments, Inc. provides optical and electrical measurement solutions from DC to RF to the wireless, semiconductor, optoelectronics, and other electronics manufacturing industries. Engineers and scientists around the world use Keithley's advanced hardware and software for process monitoring, production test, and basic research.

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