Pressure Sensors

Pressure is the expression of force to stop the expansion of a fluid. A pressure sensor measures the quantum of pressure required, expressed in force per unit area, for the purpose. These sensors apply a break in an electric circuit, on the application of pressure. Pressure sensors find many applications, from use in weather instrumentation to monitoring industrial gasses, and from automobiles to leak testing in machinery. The sensors come in many types, differentiated on the pressure range, the type of pressure, and temperature range in which the sensors operate. Absolute pressure sensors measure pressure relative to a perfect vacuum. Gauge pressure sensors, such as tyre pressure gauges, measure pressure relative to atmospheric pressure. A sealed pressure sensor is similar to a gauge pressure sensor, but measures the pressure relative to a fixed pressure. Vacuum pressure sensors measure low pressure relative to a perfect vacuum. Differential pressure sensors record the difference between two pressures, and find use in measuring fluid drops, pressure drop across air filters, and other applications. All these types of pressure sensors may be analogue, electromagnetic or some other type. Installation or use of pressure sensors may require accessories , such as adaptors, protective covers, fastening brackets, connection cables and others.