Capacitive Proximity Switches
When the object enters in the sensing zone of the switch, capacitance between two plates of capacitor (one plate is represented by electrode at sensing .face of the switch and another by all surrounding material which is connected to the earth) changes. As soon as capacitance value crosses preset level, oscillator starts. This change is detected and resulted in an output signal.
Salient Feature of Capacitive Proximity Switches (CPS)
- Hysteresis : 5-20 % of set sensitivity
- Grade of Protection : IP 65 / IP67
- Enclosure : Metallic ( Nickel plated brass) / Stainless Steel / Plastic.
- LED Indication : Provided.
Types of Capacitive Proximity Switches
- Three wire switches
- Two wire AC switches
Three wire switches
Tubular threaded enclosure
Round type housing with mounting base plate
Two wire AC switches
Cylindrical threaded enclosure
Round housing with mounting base plate