MS-2049F Detex Magnetic Switch – Flush Mounted

MS-2049F Detex Flush Mounted Magnetic Switch is designed primarily to
serve as a sensing device to detect the opening of a door or window; to
assure that a protected door is securely under surveillance; to serve as a
trigger for a wall-mounted Detex Exit Alarm; to signal that a door has
been inadvertently left open; and to be used as a direct switch to set off many kinds of audio and visual alarms.