It is recommended that the device is mechanically fastened to the selected door and door frame using small screws. The sensor should always be mounted to the door frame, and the magnet should be mounted to the door.
There is a small orientation dimple on one side of the door sensor, indicating which direction the sensor should be installed. This dimple should always reside on the side closest to the magnet. When affixed, the magnet should not exceed 2cm distance from the sensor when the door is in the “closed” position.