You have both types of contacts on the one unit, so you will always have the correct one!
Normally Open (N.O.) and Normally Closed (N.C.) per pair.
Normally Open (N.O.) and Normally Closed (N.C.) per pair.
Contact operation:
Contacts are closed cicuit when the magnet is alongside the switch. For alarm installation this is denoted as the "normal" state as the door/window is secure and the alarm is armed.
Specifications
| Operating Temperature : -40°C |
| Dimension details : Dimensions identical on switch and magnet |
| Width : 55mm |
| Height : 12.5mm |
| Depth : 13mm |
| Mounting Method : Surface |
| Attachment / Securing Method : Screw DownSelf Adhesive Tape/Pad |
| Overall Screw Spacing (H) : 44.5mm |
| Packaged Volume : 0.04l |
| Packaged Weight : 0.02kg |
| Packaged Length : 7.4cm |
| Packaged Width : 3cm |
| Packaged Height : 1.7cm |