FOR IMMEDIATE RELEASE


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

Reader Inquiries: (888) 534-8453


Cleveland, Ohio -- May 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 June 28, 2002, to shareholders of record at the close of business on June 14, 2002.


Keithley Instruments, Inc. provides optical and electrical measurement solutions from DC to RF (radio frequency) to the telecommunications, 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.

Products and company names listed are trademarks or trade names of their respective companies.


# # #