Ceramic Pressure Sensors

Ceramic pressure sensors are typically based on a piezo-resisitive Wheatstone bridge screen printed onto a ceramic membrane, this membrane can then be hermetically seald to a ceramic body or form part of a moulded body for lower production costs. The 2-part assembly enables gauge, sealed gauge and absolute references and ranges to be achieved. The moulded body version (monolithic) is only avaialble in gauge reference as there is no cavity to pull a vacuum against and seal in a absolute zero reference. Pressurer anges from 500mbar through to 700 bar are possible with this technology with varying degrees of accuracy, compensation and with the addition of electronics, a variety of output types are possibel including current 4-20mA, voltage 0.5 to 4.5V dc ratiometric and 0 - 10V!