This is a simple to use magnetic door lock sensor. Consists of a Magnet and a Magnetic Sensor. The sensor has a simple switch within it which gets activated in the presence of a magnet. To use the sensor as a door/window lock sensor, mount the magnet on the door/window and the magnet sensor on the door/window frame. When they are separated, the magnet sensor detects that the door/window is opened. This sensor can be used with other commonly available magnets also.
1 x Door Magnetic Sensor Wired ( Normally Closed )