Worldwide, we are the largest manufacturer of isolated pressure sensors on piezoresistive basis 600000 sensors are delivered to OEM-suppliers for system integration every year In Europe the largest manufacturer of ind......Worldwide, we are the largest manufacturer of isolated pressure sensors on piezoresistive basis 600000 sensors are delivered to OEM-suppliers for system integration every year In Europe the largest manufacturer of industrial transmitters 300000 sensors are yearly processed in-house as a basis for industrial transmitters, level transmitters, digital pressure measuring instruments and autonomous data collectors for pressure and temperature KELLERs strengths: High volumes at low prices, high flexibility Over 500 standard transmitter constructions Pressure ranges: 5 mbar to 2000 bar KELLER is certified according to ISO 9001 / EN 29001