Several technologies exist for the conversion of fluid pressure into an electrical signal response. The electronic sensing elements or electronic pressure sensor categories discussed in this section include the strain gauge, capacitance, potentiometric, resonant wire, piezoelectric, reluctive, and inductive types, and their many subcategories.
There are different technologies that convert fluid pressure into an electronic signal and give us feedback by using electronic pressure sensing elements called transducers. Different types of sensing elements are:
- Strain gauge
- Capacitive
- Potentiometric
- Resonant wire
- Piezoelectric
- Magnetic (inductive and reluctive type)
- Optical
Most of these devices are available either as basic sensor elements or as part of either a conventional or an intelligent transmitter.
Instrumentation Basics 