Normally open magnetic switch

Reed switches come in two main varieties called normally open (normally switched off) and normally closed (normally switched on). Free delivery and returns on all eligible orders. Since their unalarmed state is for them to be open , if the cable going to them is cut then the alarm will not trigger, and of course not be triggerable anymore.

Lead (three) white (common port), gray (N.C.), brown (N.O.). However, buying the right magnetic switch can be tricky at times.

By adding an additional nonmagnetic contact that is electrically closed with no magnetic field present, a Single-Pole, Double-Throw switch can be made.

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The reed switch is an electrical switch operated by an applied magnetic field. When the magnet is next to the switch. Material: glass conductive metal pin.

I had low cost normally open magnetic reed switch but my project needs normally closed magnetic switch. But whether those terminals are normally open or closed is another question. Product Packaging:Standard Packaging. You have both types of contacts on the one unit, so you will always have the correct one! You can get reed switches that are open with the magnet nearby.

This switch is closed when magnet is beside it. Normally Open (N.O.) and Normally Closed (N.C.) per pair. The magnet needs to be stronger, though. It has compact size and light weight which can be installed in extremely limited space,very suitable for miniaturization of devices. Longer cable variants are available.

Buy products related to reed switches and see what customers say about reed switches on Amazon. A reed switch closes the path when placed near magnetic field. Heavy duty magnetic contacts are also available for roller shutter and up-and-over garage doors. Can be mounted to any door or window to detect an opening or closing event.

Adds alarming for intrusion or unauthorized entry to your monitored conditions. Yes ,but not unique to Smarthome. Winomo Premium Recessed Security Magnetic Door Window Contact Reed Switch - Piece.