Door sensors detect door position (i.e., open or closed) based on the precise gap between the magnet and the reed switch.

It’s pricey and likely won’t work with an existing non-Hue security system, but the Philips Hue Secure contact sensor still ranks as one of the best door and window sensors we’ve tested. Signify-owned ...

Contact sensors, often known as door or window sensors, use magnets to sense open or closed states. You can use this information and the changing of these states to do all sorts of neat things in your ...

VOCOlinc continues its trend of releasing affordable HomeKit solutions that improve the smart home with the VS1, a new contact sensor which is an essential component of any smart home. When asked to ...