KELLER Quality

KELLER Quality

With numerous independent test stations with thousands of measuring channels, all our sensors, transducers and transmitters are subjected to temperature and pressure cycling. The careful analysis of up to 300 measurements per unit guarantees the high quality of all KELLER products.

Both production facilities, Winterthur in Switzerland and Jestetten in Germany, are certified ISO 9001 / EN 29001.The reliability of our testing equipment is therefore fully traceable. (Click for PDF-Version)

Approval of ATEX-products, the certificate number of which is indicated on the second page. (Click for PDF-Version)

UL approval (Series 21*, 22* and 23*) as recognized component under File E215819.
UL approval; customer specific products for use in hazardous areas.

FM approval: customer specific products for use in hazardous areas.

ECE approval: customer specific products for R10 (radio interference), R67 (special equipment for vehicles operated on liquid gas) and R110 (drive systems with compressed natural gas)

In addition to standard calibration data, we can supply on request calibration certificates to DKD (or other institution) standards.

Under "Products" the most common products are listed with their main features. For every instrument, sensor, transducer or transmitter, there is a special data sheet with detailed and guaranteed specifications.

Next to these standard instruments, we have around 400 customer specific designs mainly of transducers and transmitters.

Our application engineers will help you in selecting or adapting one of these variants to your specific needs, both in terms of special construction, special specs as well as special EMC- protection.

All products meet European production standard. Transmitters or transducers on demand with EMC-protection EN-61000-6-x.