Keithley

Keithley Instruments, now a brand under Tektronix, is a leading company in the field of measurement and test instruments. Founded in 1946 by Joseph F. Keithley in Cleveland, Ohio, the company has a rich history of innovation, particularly in the development of sensitive measurement solutions. Initially known for its Phantom Repeater, which amplified low-level electric signals, Keithley's breakthrough came with the introduction of the electrometer, which significantly contributed to the company's growth. Over the years, Keithley has expanded its product line to include a wide range of instruments and systems for high-performance production testing, process monitoring, product development, and research. The company's products are used by engineers, technicians, and scientists across various industries, including semiconductor, telecommunications, and research. In 2010, Keithley was acquired by Danaher Corporation and subsequently merged with Tektronix, continuing to operate under the Fortive family of companies, where it remains a leader in power testing and measurement solutions.