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Capacitive sensors detect liquids, particles and powders through direct contact or through non-metallic container walls. Regardless of the color and surface state of the object to be detected, or whether it is transparent or not, it can be detected reliably. The sensitivity is adjustable with the adjustable knob. It can indirectly detect liquids, powders and other materials in sealed non-metallic containers, and can identify almost all materials.
The detection principle of capacitive sensors is based on changes in capacitance. When a capacitive sensor comes into contact with or is close to a target object or substance, its capacitance changes, allowing it to detect the properties or status of the target object or substance.
L is the length of the overlapped part of the two cylinders;
D is the diameter of the outer cylinder electrode;
d is the diameter of the inner cylinder electrode;
e is the dielectric constant of the intermediate medium.
In actual measurement, D, d, and e are basically unchanged, so the level of the liquid level can be known by measuring C. This is one of the reasons why capacitive sensors are easy to use, have simple structure, high sensitivity, and are cheap. .
Capacitive sensors have a wide range of applications and are very cost-effective. The housing materials and structures can be flexibly customized. They are high-quality and low-cost, and can meet the measurement and monitoring needs of different industries.
