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Principle and Application of Capacitive Liquid Level Switch
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Principle and Application of Capacitive Liquid Level Switch

1. The principle of capacitive liquid level switch

Capacitive liquid level switches, also called capacitive liquid level sensors, adopt the principle of capacitance. The measurement of this switch is usually one plate of the capacitor, and the other plate is the outside of the switch, which is usually grounded or connected to the shell of the equipment in the measurement process.

When an object moves to the proximity switch, regardless of whether it is a conductor or not, because it is approaching, the dielectric constant of the capacitor is always changed, so that the capacitance changes, and the state of the circuit connected to the measuring head also changes. Consequently, we can turn on or off the liquid level switch.

The objects detected by this proximity switch are not limited to conductors, and can be insulated liquid or powder objects, and so on.

2. The application scenarios of capacitive liquid level switches

Capacitive liquid level switches can be applied in various industries, such as solar energy, petroleum, chemical engineering, electric power, medical treatment, food, semiconductor and other fields.

The media can be detected by capacitive liquid level switches: water, sewage, mud, beverages, and other liquids; wheat, rice, sand, cement, emery, glass, metal powder, and other powder materials.

If necessary, you can contact the professional liquid level switch supplier Feejoy Technology (ShangHai) Co., Ltd. to understand.

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