Pressure Sensor
A pressure sensor, or pressure transmitter, is used to measure the pressure of gases or fluids. They are designed to monitor changes in pressure and are often connected to safety devices that activate shut-off switches. Pressure sensors use their pressure readings to send a message to another mechanism.
Pressure sensors are capable of accurately monitoring the pressure of fluid and can be a cheap alternative to flow sensors. Pressure sensors are used in weather instruments, aircrafts, and automobiles. They also monitor the engines in many different kinds of machinery.
There are five types of pressure sensors: absolute, gauge, vacuum, differential, and sealed. Absolute sensors measure the pressure relative to O PSI, perfect vacuum pressure. Gauge sensors, in comparison, 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, while differential sensors measure the difference between two or more pressure inputs in 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.