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.

General Characteristics