Overwhelming Swiss KELLER quality that leaves no room for others to follow.
Unmatched Swiss KELLER quality that leaves no room for others to follow.
The pressure sensors produced by KELLER in Switzerland are the original products invented over 50 years ago by founder Hannes W. Keller. Each package bears our quality seal, proving that all delivered products are within the specified accuracy class. KELLER symbolizes high-precision measurement technology. In 1966, Hannes W. Keller (commonly known as HWK) was working at the Honeywell Research Center in Minneapolis, USA. There, he invented the integrated silicon measuring cell, a high-precision measuring element manufactured using semiconductor technology, in collaboration with A.R. Gias. This silicon measuring cell was already incorporated into Honeywell's process transmitters and introduced to the American market in 1971. HWK brought this young invention back to Switzerland, developed the first high-precision static pressure transducer, and has been manufacturing it at the headquarters in Winterthur, Switzerland, since 1974. On July 25, 1978, HWK's invention was officially patented (U.S. Patent No. 4103273). The patent number is also embedded in the quality seal. For more details about KELLER quality, please refer to the related links below!
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Pressure measurement
