10Pcs/Lot Wired NO Wooden Door Contacts Magnetic Switch Access Control w/Screws

Specification: 

- Working Principle: Magnetic is composed of two parts:a part is permanent magnet and other part is a normally reed switch,when permanent magnet close reed switch(less 5mm),agnetic sensor is working station(short circuit). when magnet separate,it is normal open state.
- metals shield  anti-fire ABS
- connecting mode: NO(Close is shot-circuit)
- rated current  :  300(mA)
- rated  voltage :  (VDC) 220
- operating distance: 15~20mm
- power: 3(W)
- Dimension:64*19.5*13mm
- Application:access control ,alarm system

Package Included:

- 10x Magnetic Sensor Switches

Note:

please read the following carefully to ensure that the product is what you are looking for. Thank you 

How to distinguish between Recessed NO Magnetic Window and Recessed NC Magnetic Window？

The Recessed Magnetic Window is composed of a reed switch and a magnet.

1. The reed switch is normally open（NO）. When there is no magnet approaching, two small pieces of magnetic reed are disconnected; when  the magnet is close, two small pieces of magnetic reed are connected. This is a normally open Recessed Magnetic Window（NO）. 

Switch Pattern:normally open (NO), when the door(magnet) closed, the switch keeps connecting 

2. The reed switch is normally closed（NC）.  Two small pieces of magnetic reed are connected when there is no magnet approaching. 
Two magnets are separated when a magnet approaches. This is a normally closed Recessed Magnetic Window(NC)
Switch Pattern:normally closed (NC), when the door closed, the switch are separated.