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Powelectrics > Sensing Solutions > Proximity Switches & Sensors
Proximity Sensors Inductive & Capacitive proximity sensors from Powelectrics Ltd
The range of proximity switches we have on offer satisfy both standard and special requirements, including both capacitive and inductive detection methods.
We have available sensors for high temperature use, sensors with analogue outputs, sensors that have been climate proofed, sensors with built in self diagnostics and sensors for intrinsically safe applications.
An inductive proximity switch works with a high frequency oscillating circuit that creates an alternating electromagnetic field on the active sensor surface by means of a coil. When a metallic object nears this field a damping occurs in the oscillating circuit. If this damping exceeds a threshold value, a switching signal is generated.
A capacitive proximity switch works with a high frequency oscillating circuit that creates an electromagnetic field on the active sensor surface by means of a capacitor. When a substantial or fluid substance nears this field a capacitance unbalance occurs and leads to a variation of the amplification in the oscillating circuit. If this amplification exceeds a threshold value, a switching signal is generated.
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