The Keller company, founded in 1974 in Switzerland, is the largest manufacturer of overpressure sensors in Europe. Thanks to the timely creation and implementation of an advanced piezoresistive sensor, Keller is today the main innovator and leader in pressure measurement technologies. A key feature of the company is that “Keller AG” focuses all its efforts and ideas on control and measuring instruments, without trying to cover everything. Today, 5 Swiss factories produce 1,000,000 pressure sensors per year, meeting the needs of even the largest consumers. Notably, a quarter of the sensors produced are supplied to other manufacturers of pressure measuring instruments.
An overpressure sensor is a measuring instrument that has a separating diaphragm for contact with the measured medium, and the pressure exerted on the diaphragm, through oil filling, transmits the pressure to a silicon piezoresistive crystal. The pressure value is determined by the change in the bridge resistance. The deformation of the electrical signal is the basis of the piezometric technology developed by Hans W. Keller in 1973.
Key Features of Keller Overpressure Sensors
Compact design and various structural versions allow the overpressure sensor to be installed anywhere necessary without dismantling large structures. The customer can independently “assemble” the overpressure sensor depending on the required accuracy, design, output signal, threaded connection, and even the material from which the pressure sensor and cable, if needed, will be made.
The Keller 21Y pressure sensor has high accuracy and reliability, and it is always available to the customer.
| Pressure range: | from 0...1 bar to -1...1000 bar |  |
| Storage/operating temperature: | -40…100°C | |
| Basic error |
0.5% FSO |
The Keller 23SY pressure sensor has higher accuracy and very low temperature error.
| Pressure range: | 0...0.1 bar to -1…1000 bar |  |
| Storage/operating temperature: | -40…120°C | |
| Basic error |
0.25% FSO |
The Keller 25Y pressure sensor has a fully welded design and a flat diaphragm. It is ideal for measuring liquid level (hydrostatic level sensor).
| Pressure range: | 0...0.1 bar to -1…1000 bar |  |
| Storage/operating temperature: | -40…120°C | |
| Basic error |
0.25% FSO |
The basis of the high-precision Keller 33X pressure sensor is a stable piezoresistive sensor with the latest XEMICS microprocessor electronics with an integrated 16 (20) bit A/D converter.
| Pressure range: | 0...1 bar to -1…1000 bar (2000 bar) |  |
| Storage/operating temperature: | -40…120°C | |
| Basic error |
0.05% FSO (option 0.01% FSO) |
The 41X series is a ceramic capacitive sensing element, optimal for measuring low pressures.
| Pressure range: | from 0…10 mbar to 0…300 mbar |
|
| Storage/operating temperature: | -30…80°C | |
| Basic error |
0.1% FSO |
Buy Keller
You can learn more about our range of overpressure sensors here.
You can always contact our specialists, who will be happy to select the optimal overpressure sensor for solving your task.
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