KELLER AG was established in 1974 by Hannes W. Keller, the inventor of the integrated silicon measuring cell. Today, his sons Tobias and Michael Keller run the business. The company is wholly family-owned and employs 450 staff.
KELLER feels a strong connection to its home of Switzerland. Its headquarters are where the value is added and where most of our employees work. As a result, all KELLER products bear the quality seal 'Made in Switzerland' and embody the Swiss values of quality, functionality and reliability.
KELLER is certified to ISO 9001. This means that our measured values can be fully traced to national standards.
KELLER is known for Swiss quality and precision . Ever since the company was established, it has produced all its products at its facilities in Winterthur. For more than 45 years, we have been pairing expertise with innovative spirit to find the right solutions for each individual application. The customer's wishes are our key focus.
Encapsulated piezoresistive pressure transducers for absolute and gauge pressure measurement are KELLER's core competence and lie at the heart of all KELLER products for end users. They have proved their worth millions of times over and are a reliable base for any measuring system. Transducers can be adjusted and optimized according to your needs.
Pressure transmitters are sensors that use additional electronics to compensate for linearity deviations and temperature errors, outputting measurement results as standardized signals. Every transmitter is measured over the entire pressure and temperature profile and compared to the desired signal span.
Submersible probes for level and fill measurement. With a special design and cable and housing materials that have been chosen for compatibility with their surroundings, these probes can be used in a wide range of liquids.
Digital pressure gauges
High-quality digital manometers with easily readable displays and practical additional functions. Display units for use with KELLER transmitters or for processing standard signals from other sources.