5 x Door Window Normal Closed Contact Security Safety Alarm Magnetic Reed Switch Sets Curtain Accessories Applicable to machinery control boxes

Applicable to machinery control boxes

Magnetic hex nut driver

5-1mm larger than the diameter of the female rod

Shrinkable Temperature:80

5 x Door Window Normal Closed Contact Security Safety Alarm Magnetic Reed Switch Sets Curtain Accessories Applicable to machinery control boxesNC means Normally Closed: When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ). When make order,pls check carefully! The Reed Switch is an electrical switch operated by an applied magnetic field. It was invented at Bell Telephone Laboratories in 1936 by W. B. Ellwood. It consists of a pair of contacts on ferrous metal reeds in a hermetically sealed glass envelope. There