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.
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.
Operating Temperature and Humidity
| Operating Temperature | -40.0 °C |
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Product Dimensions
| Width | 55.0 mm |
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| Height | 12.5 mm |
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| Depth | 13.0 mm |
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| Dimension details | Dimensions identical on switch and magnet |
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Packaged Dimensions
| Packaged Dimensions | 7.4cm(Length) x 3.0cm(Width) x 1.7cm(Height) |
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