Passive Infra-Red Motion Detector Sensor Detects Body Heat to Alert of Intruders PIR motion sensor uses infrared to monitor movement of warm bodies in a specific area. Once movement is detected, the sensor activates a call from your Sensaphone remote monitoring system. NOT Compatible with IMS System. PIR Motion Detector FGD-0007 Specifications Compatible with all Sensaphone models except IMS. Detects body heat. Causes a dial-out if motion is detected. Range of detection covers approximately 50 ft. of area. Multiple sensors can be wired in series to a single input. Range Approximately 40 feet, with 75 degrees of coverage. Dimensions 4 x 6 x 1.5 Warranty 1 year limited manufacturer's warranty. This item ships from a separate warehouse and may require extra time for delivery.