Metallux ME770pressure sensors are made with a ceramic base body glued to a flush diaphragm and work following the piezoresistive principle. The Wheatstone bridge is screen printed on one side of the ceramic diaphragm. The bridge faces the inside of the sensors where a cavity is made. Signal conditioning electronics are added to generate 0.5...4.5 V ratiometric output (ME770), current loop 4...20 mA (ME771) or 0...10 V non-ratiometric output (ME772).
Pressure and temperature calibration are done electronically with the onboard ASIC and can be performed in bar (ME77x) or in psi (MEP77x). Electronics provide offset and span correction when the temperature changes. Ageing detection is constantly performed. This new method guarantees good precision and long-term stability. The Metallux ME77x family meets EMC requirements. The ASIC stores production lot-specific data for sensor traceability and allows custom calibration.
Due to the excellent chemical immunity of the Al2O3 ceramic, the ME77x sensors are suitable for nearly all aggressive media.
ME770 - Piezoresistive Pressure Sensor Features
- Excellent resistance to corrosion and abrasion
- Signal conditioning
- EMC compliant
- Thermally compensated
- Zero stress mounting software
