Recessed NO Magnetic Window/Door Contacts Security Alarm Switch Reed w/Adhesive

Features:

Switch Pattern: normally open (NO), when the door closed, the switch keeps connecting
Mounting Nethod: SMD (by screws or double-sided tapes)

Product Parameters:

Voltage: 100 V DC
Type:Normal Open（NO）
Rated Power: 10W
Contact Capacity: Maximum switch current: 0.5Amp
Actuation distance:20-25mm
Material: Nd magnetic
Housing Material: ABS
Wire lead: 22 Awg, 300mm long
Color: white
Dimensions: 27(mm)X14(mm)X8(mm)

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.