Pressure Transmitter
A pressure transmitter is used to measure, monitor, and transmit the pressure of liquids or gases. Pressure transmitters are designed to monitor changes in pressure and are often connected to safety devices that activate shut-off switches. The term pressure transmitter is synonymous with pressure sensor. This signal from a pressure transmitter is passed on to devices like computers, chart recorders, and digital panel meters, which interpret the data.
There are five types of pressure sensors or transmitters: absolute, gauge, vacuum, differential, and sealed. Absolute sensors measure the pressure relative to O PSI, perfect vacuum pressure, while gauge sensors can be calibrated to measure the pressure relative to atmospheric pressure at a given location. Gauge sensors are the most common of the five types of pressure sensors. Vacuum sensors are used to measure pressure that is less than local atmospheric pressure, and differential sensors measure the difference between two or more pressure inputs into the unit. The last kind of sensor, sealed, is similar to the gauge sensor, except that it measures pressure relative to the pressure at sea level, 16.4 PSI.
Pressure transmitters are used in weather instruments, aircrafts, automobiles, and several other items. They also often monitor the engines in many different kinds of machinery.
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