Today many measuring principles are used in electronic pressure measurement instruments. Most methods are based on the measurement of a displacement or force. In other words, the physical variable “pressure” has to be converted into an electrically quantifiable variable. Unlike mechanical pressure measuring methods, this conversion requires an external power source for the pressure sensor.
This pressure sensor is the basis of electronic pressure measurement systems. While mechanical gauge element displacements of between 0.004 and 0.012 inches are standard, the deformations in electronic pressure sensors amount to no more than a few microns.
Thanks to this minimal deformation, electronic pressure measurement instruments have excellent dynamic characteristics and low material strain resulting in high resistance to alternating loads and long-term durability.
Listed below are pressure sensor technologies used by WIKA in its transmitter, transducer and sensor instruments:
- Ceramic Thick Film Sensor (top left and top middle images)
- LVDT (Linear Variable Differential Transformer) Sensor
- Piezoresistive (Piezo) Sensor (center and center right images)
- Thin Film Sensor (bottom left, bottom middle and bottom right images)