To mount the Door and Window Sensor, place one piece on the door itself and one piece on the frame. Ensure that the sensor is set up as follows.
- The notches on the two pieces are aligned
- The two pieces are less than 3/4" apart (less than a thumb’s width of each other)
- The two pieces are flush on the same plane.
- The door is within 100 ft. of the Control Panel.
"My sensor doesn't look like this"
Click on the image below that matches your sensor: