Keithley Instruments

Precision electronic measurement instrument manufacturer, now a brand under Tektronix.

Last updated August 31, 2026

Overview

Keithley Instruments is an American company specializing in precision electronic measurement instruments such as source meters, digital multimeters, and data acquisition equipment. Founded in 1946, it was acquired by Danaher in 2010 and later integrated into Tektronix.

Products and positioning

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