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We are leading exporter of Capacitive Proximity Sensors are able to detect both metallic as well as nonmetallic objects. The larger the dielectric constant of the object, the larger is the sensing range of the sensor. These can for example be used in  level control, presence control, level control of bulk solids, final inspection of packaging procedures 

Working principal of Capacitive Proximity Switches 
When an object ( metallic or non metallic) approches the active surface the capacitance between the mass and the active zone of the proximity sensors increases. When the preset value is exceeded the oscillator starts, the oscillator voltage changes,the trigger stage activated and this results in a change in the switched output condtion.

Applications of Capacitive Proximity Switches
Capacitive proximity switches are particulary suitable for controlling the filling level in tanks where liquid, powder or granulated materials are to be monitored.

Capacitive proximity switches or sensors are primarly used when the object to be detected is non metallic. Capacitive sensors sensed the most common materials are : plastic, glass, wood and paper. Another common application is as a liquid level control in a bin or hopper.

Capacitive proximity switches are ideal for this type of application, since they can be adjusted to ignore the side of the enclosure.