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About

KELLER Pressure is a Swiss, family-owned manufacturer of high-precision pressure transducers and transmitters, founded in 1974 by physicist Hannes W. Keller, the inventor of the integrated silicon measuring cell. Headquartered and fully manufactured in Winterthur, Switzerland, all KELLER products carry the "Made in Switzerland" quality mark. The company produces over 1.3 million measuring cells per year, covering pressure ranges from 5 mbar to 2000 bar for absolute, relative, and differential pressure measurement. The product portfolio also includes level probes, digital manometers, data loggers, remote transmission units, and pressure calibrators. KELLER is Europe's leading manufacturer of isolated pressure sensors and operates a global network of 13 subsidiaries and approximately 30 distribution partners worldwide. As a wholly family-owned business under the leadership of Tobias and Michael Keller, the company is certified to ISO 9001 and is known for high-volume production at competitive prices with the flexibility for custom solutions.

Company Facts

Year Founded

1974

Employees

500

Countries Served

France, Italy, Switzerland, United States, Germany, Netherlands, United Kingdom

Taking New Projects

Not currently

Location

Winterthur, Switzerland

Contact

Email

[email protected]

Address

St. Gallerstrasse 119, 8404 Winterthur, Switzerland

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Company details are independently compiled and may not be current.

Profile last updated: May 2026