What is the principle of capacitive level measurement?

Working Principle: The principle of capacitive level measurement is based on change of capacitance. An insulated electrode acts as one plate of capacitor and the tank wall (or reference electrode in a non-metallic vessel) acts as the other plate. The capacitance depends on the fluid level.

What is a capacitance level gauge?

Capacitance level gauges are used to measure the change of capacitance to measure the unevenness of the liquid level. It is a metal rod pierced into the liquid container, the metal rod serves as one pole of the capacitor, and the container wall serves as the other pole of the capacitor.

Can capacitive sensor be used to measure liquid level in storage tanks?

These properties of capacitor can be used to measure the liquid level in storage tanks. The various aspects and configurations of capacitive liquid level measurement have been described. Here, review is also done on the several types of liquid level measurement techniques using capacitive sensor, for conducting and non-conducting liquid.

How do you find the capacitance of a capacitor?

Capacitance is the ability of a body to store electrical charge. The capacitance, C, is given by where Q is the charge on the capacitor and V is the voltage across the capacitor. In the capacitor shown in Figure 1, two parallel metal plates with area A are separated by distance d. The capacitance, C, is where Figure 1.

What is a capacitive liquid level sensor?

Capacitive liquid level sensor fundamentally deals with the influence of temperature, humidity, pressure, material conductivity and other factors on the measurement process, so it has extremely high anti-interference and reliability. It can measure strong corrosive liquids, such as acid, alkali, salt, sewage, etc.

How to calibrate a capacitive level transmitter?

Capacitive level transmitters must always be calibrated for zero and span in the field. The concentric probe can be tested in a bucket or small tank of the liquid to be measured; all other probes must be calibrated after final installation by changing the material level and adjusting the zero and span pots.