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Pressure Sensors, How They Work

The ELDEC Silicon On Sapphire (SOS) design incorporates silicon strain gauges configured as a fully active 4-arm bridge molecularly bonded to a sapphire diaphragm. Applied pressure induces strain resulting in a differential output voltage proportional to excitation and applied pressure. This construction takes advantage of material properties to provide a superior pressure measuring device. In the ELDEC pressure sensor, a separate temperature sensing resistor, isolated from pressure effects, is located directly on the sapphire pressure measuring diaphragm. This integral temperature sensor allows ratiometric temperature compensation for highest accuracy.

Pressure Sensors, How They Work

General Characteristics

Pressure bridge resistance:	4,500 ohms nominal
Excitation voltage:	10 volts nominal
Temperature Sensor:	10,000 ohms nominal
Size:	One inch dia. for 15 to 500 psi F.S.
Packaging:	To suit, contact ELDEC

For a brochure, or more information send an email to Ask the Expert on Pressure Sensors.