Aleph PS2023 3" Magnet Alarm Overhead Contact

The Aleph America PS-2023 Overhead Door Contact is a two-part device used to safeguard doors. One part of the contact is a switch installed in the door jam; the other contains a magnet and is placed in the door itself. Installing magnetic contact allows you to keep an eye on any locations where an intruder might force their way in, any noticeable shift in contact with the switch results in an alarm. The magnetic contact comes with a hermetically sealed switch and a high grade magnet.