A pressure sensor translates pressure data into an electrical current. Then a data analyzer reads that current for your system. So let’s talk about the four pressure sensor types you need to know.
The 4 main pressure sensor types
Ceramic cell pressure sensor
First of all, we have the ceramic cell pressure sensor. It has a conductive surface that charges a capacitor. When a force applies pressure, the charge increases or decreases. And that depends on the pressure applied. Closed cells measure absolute pressure, and open cells measure gauge pressure.
Pressure sensor with strain gauge
In addition, you can use pressure sensors with strain gauges. They measure hydrostatic pressure in tanks using a Wheatstone bridge. That means that under pressure, the strain gauge deforms. This, again, produces a change in resistance.
Differential pressure transmitter with metal sensor for continuous measurement
Pressure sensor with metallic diaphragm
We also have pressure sensors with metallic diaphragms. They use semiconductors to sense changes in resistance according to the change in pressure in the sampling chamber.
Pressure switch for absolute and gauge pressure in hygienic applications
Silicon resonant pressure sensor
Finally, Yokogawa’s silicon resonant pressure sensors use micro-electro-mechanical systems (MEMS) technology. Here, two resonators pick up frequency shifts when tension or compression occurs. Then, this sensor connects to the sampling chamber of the transmitter.
Also, different connections and primary elements link the process medium and the actual sensors. Coplanar™ transmitters by Emerson can connect to several types of manifolds. Plus, it can connect to valves without changing the setup.
To know more about pressure sensors, please ask our engineers!