Contact: Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139

Keithley Instruments to Present
at First Annual Robert W. Baird Small Cap Conference

Cleveland, Ohio - August 1, 2003 - Keithley Instruments, Inc. (NYSE:KEI), a leader in solutions for emerging measurement needs, announced that it will participate in the first annual Robert W. Baird & Co. Small Cap Conference August 5-6, 2003. The Conference is being held at the Four Seasons Hotel in New York, New York. Joseph P. Keithley, the company's Chairman, President and Chief Executive Officer and Mark J. Plush, its Vice President and Chief Financial Officer, will make a presentation on Tuesday, August 5, 2003 at 1:20 p.m. Eastern Time, which will be available live on Keithley Instruments website at under the Investor Relations section. A replay of the webcast will be available until September 5, 2003. A copy of the presentation will also be posted on Keithley's website.

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.

# # #