A capacitive sensor is a proximity sensor that detects nearby objects by their effect on the electrical field created by the sensor. In electrical engineering, capacitive sensing (sometimes capacitance sensing) is a technology, based on capacitive coupling, that can detect and measure anything that is conductive or has a dielectric different from air.
Capacitive sensors are used for non-contact detection of metallic objects & nonmetallic objects (liquid, plastic, wooden materials and so on). Capacitive proximity sensors use the variation of capacitance between the sensor and the object being detected. When the object is at a preset distance from the sensitive side of the sensor, an electronic circuit inside the sensor begins to oscillate. The rise or fall of such oscillation is identified by a threshold circuit that drives an amplifier for the operation of an external load. A screw placed on the backside of the sensor allows regulation of the operating distance. This sensitivity regulation is useful in applications, such as detection of full containers and non-detection of empty containers.
|Level Control of Liquids||Level Control of Solids||Pile-up Control||Feed Hopper Level Monitoring|
|Small Vessel Pump Control||Grease Level Monitoring||Pharmaceuticals Manufacturing||Suitable for Use with Chemicals|
|Pipeline Leak Detection||Vessel Leak Detection||Position and displacement detection|
|High sensitivity||Useful for small system.||High frequency Response|
|Low Power Consumption||Less loading effect due to high input impedance.|