Keithley Receives Prestigious Industry Awards Recognizing Innovation in Low-Level Measurement Products

Cleveland, Ohio - January 20, 2005 - Keithley Instruments, Inc. (NYSE:KEI), a leader in solutions for emerging measurement needs, has received a "Best in Test Award" from Test and Measurement World magazine for the combination Model 6221 Precision AC/DC Current Source and Model 2182A Nanovoltmeter. The award recognizes the best test and measurement products introduced during 2004 and is given by the editors based on a product's innovation and usefulness. Keithley also received a 2004 Editors' Choice Award from Control Engineering magazine for the Model 6221 Precision AC/DC Current Source. Editors selected the winners of this award from among the new products featured in 2004 issues of the magazine.

The Model 6221 Precision AC/DC Current Source can source low currents with very high accuracy and built-in control functions make it ideal for characterizing semiconductor and nanotechnology materials. The Model 6221 complements the Model 2182A Nanovoltmeter, an instrument that lets customers make low-level electrical measurements in production and research facilities.

For more information on Keithley's Model 6221 Precision AC/DC Current Source or Model 2182A Nanovoltmeter, visit http://www.keithley.com/pr/009.html.

With more than 50 years of measurement expertise, Keithley Instruments (www.keithley.com) has become a world leader in advanced electrical test instruments and systems from DC to RF (radio frequency) geared to the specialized needs of electronics manufacturers for high performance production testing, process monitoring, product development, and research. By building upon our strength in electrical measurement solutions for research, Keithley has become a production test technology leader for the semiconductor, wireless, optoelectronics, and other precision electronics segments of the worldwide electronics industry. The value we provide to our customers is a combination of precision measurement technology and a rich understanding of their applications to improve the quality, throughput, and yield of their products.

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