Collection: Door & Window Sensors

Many wireless sensors send alerts directly to a phone app on their own, but they are most useful paired with an alarm system or a smart hub that can trigger sirens and automations.

Most use double-sided adhesive pads so no drilling is needed: stick one half on the frame and the other on the door or window, keeping the alignment marks close together when closed.

The gap tolerance is the maximum distance the two halves can sit apart while still registering as closed. A larger tolerance helps on uneven or thick frames so you avoid false alerts.

Yes, sensors that support common protocols connect through a compatible smart hub and appear in your app, letting you create automations across the Smart Home ecosystem.

Battery life varies by model and how often the door is used, but many wireless contact sensors run for a long time on a single cell. Keep spare batteries from Power & Cables on hand.

Sensors paired with a local hub or alarm panel can still trigger sirens offline, though phone notifications usually need an internet connection. Combining them with motion sensors adds redundancy.

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