This door sensor is a reed switch housed in a durable ABS plastic shell. Usually, the reed is 'open' with no wire connection. The other part is a magnet. When the magnet gets within 13mm (0.5') of the switch, it closes. Ideal for detecting open doors or drawers, it comes with mounting tabs and screws. You can also use double - sided foam tape from a hardware store for easy installation without screws.

Using this magnetic door sensor is super easy. First, decide where you want to install it, like on a door or a drawer. You can either use the provided mounting tabs and screws for a more permanent fit. Or, if you don't want to drill holes, pick up some double - sided foam tape from a hardware store and stick it in place. Make sure the magnet part is close enough to the sensor part, within 13mm (0.5'), so it can work properly. As for maintenance, keep the sensor clean. You can gently wipe it with a dry cloth every once in a while. Avoid exposing it to extreme temperatures or wet conditions as this might affect its performance. If you notice any issues, check the connection between the wires and make sure the magnet and the switch are properly aligned.