Magnetic contact switch normally open

Free delivery and returns on all eligible orders. Reed switches come in two main varieties called normally open (normally switched off) and normally closed (normally switched on). The latter has three paddles: a single reed enters the capillary at one end and two enter from the other, creating . Lead (three) white (common port), gray (N.C.), brown (N.O.).

Remove the magnet and the reeds return to their original position breaking the circuit.

Cut-out diagram of normally open reed switch.

A normally closed switch works in the opposite way, when no magnetic field is present the reeds are in full contact , the electric circuit is complete .

Longer cable variants are available. When the magnet is next to the switch. Magnetic Contacts - Flush mount, surface mount heavy duty reed contacts for normally open and normally closed alarm circuits.

It comes complete with fixing screws. It has compact size and light weight which can be installed in extremely limited space,very suitable for miniaturization of devices. Material: glass conductive metal pin. Normally open circuits close when the magnet engages.

Aleph Magnet Actuation Proximity Sensors. 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 ). You can get reed switches that are open with the magnet nearby. The magnet needs to be stronger, though. This is the Magnetic Door Switch Set, a small reed switch assembly specifically designed to alert you when doors, drawers, or any other aperture opens.

A magnet and reed switching sensor for burglar alarms, normally to be recessed into doors or windows and their frames. One part contains the magnet while the other part contains the reed switch , which is normally closed in the presence of the magnet. Adhesived Security Door Window Magnetic Contact Reed Switch NO. See and discover other items: home alarms, reed switch , security screws, sensor alarm, window alarms, door weight . There are two types of reed switches : normally open reed switches and normally closed reed switches.

Reed switches are actuated by the field from an external permanent magnet or electromagnet placed in close proximity.