Inexpensive proximity sensor with internal reed switch, that is turned on and off by change of magnetic field strength (vertical, horizontal or longitudinal movement of magnet).

Contact Forms:

N.O. Contact (Normally Open)
Contact which is normally open. It will be closed when magnetic field is applied.

N.C. Contact (Normally Closed)
Contact which is normally closed. It will be opened when magnetic field is applied.

Transfer Contact (Form "C")
Common contact (wiper) will transfer from N.C. to N.O. contact when magnetic field is applied.¡