An inductive alternating r.F. Field is developed at the front of the sensing surface of the proximity switch. This field is generated by the resonant circuit coil of the oscillator.
Energy is absorbed when a metal piece is brought into the r.F. Field near the sensing surface, causing oscillation to stop. Hence the demodulated voltage feeding the trigger disappears.
For DC switches
the trigger operates rapidly when oscillation stops and this trigger switches the output transister, which can be either NPN or PNP to drive an electronic circuit or relay.
FOR AC SWITCHES
A thyristor is triggered when oscillation stops due to the presence of metal . This thyristor is connected in series with a bridge and this series combination is connected to the AC load.
Established in the year 1994, we, “Parasnath Electronics Private Limited”, are a prestigious ISO 9001:2008 and CMRI certified business organization engaged in manufacturing, supplying and exporting a comprehensive assortment of Electrical Switches and Proximity Sensors.
More details:View company website
Its Free
Verify Now
