Contact: Keithley Instruments, Inc.
28775 Aurora RoadCleveland, Ohio 44139

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Keithley Receives Product Innovation Awards

Cleveland, Ohio -- January 13, 2003 -- Keithley Instruments, Inc. (NYSE: KEI) today announced that it has been recognized by three trade magazines for its electronic measuring product innovations during 2002. The Model 6487 Picoammeter/Voltage Source was chosen as a Product of the Year by the editors of Electronic Products magazine for its ability to measure extremely low currents. The Model 2701 Ethernet-Based DMM/Data Acquisition System, the industry's first high precision multipoint test system with Ethernet long-distance networking capabilities, is one of EDN magazine's Top 100 Products for 2002. Lastly, the Keithley Model S600DC/RF Automated Parametric Test System for semiconductor testing received an Honorable Mention as Best-in-Test from the editors of Test & Measurement World (T&MW) magazine.

The Model 6487 Picoammeter/Voltage Source has a unique set of capabilities, including low current sensitivity near that of the most sensitive instruments available (down to 20 femtoamps or 0.000000000000020 amps). The Model 6487 is the most cost-effective measurement solution for materials research in a variety of industries.

The Model 2701's Ethernet network capabilities allow it to make precision measurements easily and economically just about anywhere. It is the first Ethernet-compatible instrument of its type to provide "instrument-grade" measurement performance.

Integrated circuit (IC) manufacturers use the Model S600DC/RF automated test system for testing radio frequency (RF) communications devices during the early phases of manufacturing, while these devices are still part of a silicon wafer. The S600DC/RF system's ability to execute independent direct current (DC) and RF measurements simultaneously helps reduce the time and cost of testing today's advanced IC devices.

About Keithley Instruments. Keithley Instruments, Inc. provides electrical, RF (radio frequency), and optical measurement solutions to the telecommunications, semiconductor, optoelectronics, and other electronic components 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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