Pressure Sensors

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ME770
PRESSURE RANGE fso (bar) 0.5-1-2-5-10-20-50-100-200-400-600-800 bar
PRESSURE TYPE GAUGE - SEALED GAUGE - ABSOLUTE
TECHNOLOGY PIEZORESISTIVE CERAMIC PRESSURE SENSOR
DIAMETER (mm) 18.00 mm
STRUCTURE FLUSH DIAPHRAGM
THERMAL DRIFT %FS/°C CALIBRATED
SIGNAL CONDITIONING YES, ON PCB
OFFSET 0.5 V
TERMINATION PITCH NA, Wires
SIGNAL OUTPUT 0.5…4.5 V - RATIOMETRIC

Metallux ME77x and MEP77x pressure sensors are made with a ceramic base cell and a flush diaphragm and work following the piezoresistive principle. The Wheatstone bridge is screen printed on one side of the flush ceramic diaphragm which is, in turn, glued to the sensor’s body. The bridge faces the inside 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 on-board ASIC and can be performed in bar (ME77x) or in psi (MEP77x). Electronics provide offset and span correction when temperature changes. Aging detection and compensation are constantly performed. This new method guarantees good precision and long-term stability. The Metallux ME77x family meets EMI requirements. The ASIC stores production lot specific data for sensor traceability and allows custom calibration. Due to the excellent chemical immunity of the the Al2O3 ceramic, the ME77x sensors are suitable for nearly all aggressive media.