Keller M5 series miniature pressure sensor

The challenge to measure highly dynamic pressure variance is to achieve, as much as possible, a direct connection between sensing element and medium. The Keller M5 series pressure sensor offers a micromechanical solution without a media isolation diaphragm (with its damping effect), capillary tubing, sealants or adhesives. In the M5 series, the rear of the silicon sensor is soldered to a supporting element designed for excellent fluid dynamics, which in turn is secured flush at the front of the pressure connection. This design enables dynamic measurements with a bandwidth of 0-50 kHz and offers a number of additional benefits that include high decoupling of mounting forces and structure-borne vibration, extensive media compatibility and the durability offered by the anti-oxidation coatings. Other features of the M5 series are its overpressure protection of up to five times the measurement range and its pressure connection with an external thread of 5 mm for installations in space-limited locations.

The M5 series pressure sensors are designed for operating temperatures between -40 and +180°C with a narrow total error band (including temperature errors) of ±1%. Without the remote signal converter, they come with a typical output signal range of 80 mV (based on a 1 mA supply) and an individual calibration certificate. The measurement ranges are 3, 10 and 30 bar for absolute pressure measurements. Separating the pressure sensor and the signal converter enables measurements at close proximity, even in units installed in cramped conditions and exposed to high temperatures.