The magnet and the transmitter need to be installed within 0.75 inches of each other when the door or window is closed in order for the 5811 to work properly.


This distance is referred to as a magnet gap.  As long as the magnet gap (distance from the magnet to the transmitter) remains less than 0.75 inches, the alarm will not sound.  However, when a door or window is opened, the gap expands beyond the 0.75 inch point and an alarm will sound.

When it comes to installation, it is recommended to mount the transmitter on the door/window frame and the magnet on the moving part of the door or window.  Make sure to clean the mounting surface and use double-sided tape to mount the transmitter and magnet.  Test the 5811 by opening and closing the door/window.


Similar Products:
5814 Ultra Small Door/Window Transmitter
5815 Door/Window Wireless Transmitter