FGD-0006 Door or Window Magnetic Reed Switch For Sensaphone Remote Monitors Magnetic door switch security sensor for windows or doors detects unauthorized entry or intrusion. Hook the magnetic sensor on the frame with the secondary piece on window or door. NOT Compatible with IMS System. Use with all Sensaphone station sitter or other remote monitors to detect any unauthorized entry or intrusion. Usually installed on doors and windows, the sensors monitor their opening and closing. Several magnetic reed switches may be wired in series. FGD-0006 Door or Window Magnetic Reed Switch: Works with all Sensaphone products except IMS system. Parts (no wiring is included) (1) Sensor (1) Spacer (1) Sensor Casing (white plastic) (1) Magnet (4) Mounting Screws (1) Installation Instruction Dimensions: 2.5" x 0.75" x 0.5" (part with screw terminals); 2.5" x 0.75" x 0.625" (part with magnet)