Capacitor pressurization explanation diagram

How does a capacitor pressure sensor work?

The Capacitive pressure sensor operates on the principle that, if the sensing diaphragm between two capacitor plates is deformed by a differential pressure, an imbalance of capacitance will occur between itself and the two plates. This imbalance is detected in a capacitance bridge circuit and converted to a D.C. output current of 4 to 20 mA.

What is a capacitive pressure sensor?

A capacitive pressure sensor is a type of sensor that measures changes in electrical capacitance caused by the movement of a diaphragm. The most commonly used capacitive pressure sensors are either parallel plate capacitors or cylindrical capacitors. Working principle: A capacitor consists of two parallel conducting plates separated by a small gap.

What is the working principle of a capacitive pressure transducer?

Capacitive Pressure Transducer Working Principle – A linear change in capacitance with changes in the physical position of the moving element may be used to provide an electrical indication of the element’s position. The capacitance is given by where C = the resultant capacitance.

How does a capacitance monitor work?

Its distance from the stationary plate to its left, as determined by the pressure applied to the unit, determines the capacitance between the two plates. The monitor indicates the pressure equivalent of the unit’s capacitance by measuring the capacitor’s reactance to the ac source voltage.

How does a capacitor work?

A capacitor consists of two metal plates separated by a dielectric. A capacitor is capable of storing electrical charge and energy. The higher the value of capacitance, the more charge the capacitor can store. The larger the area of the plates or the smaller their separation the more charge the capacitor can store.

How does a diaphragm and capacitor form a differential variable separation capacitor?

The sensing diaphragm and capacitor thus form a differential variable separation capacitor. When the two input pressure are equal, the diaphragm is positioned centrally and the capacitances are equal. A difference in the two input pressures causes displacement of the sensing diaphragm and is sensed as a difference between the two capacitances.