More Info About Security Sensors&Alarms

China Wholesale Security Sensor & Alarms - Motion sensor / motion detection systems detect movement in areas covered by the security sensors. Some motion detection systems transmit high frequency radio wave signals into the secure area of a room or hallway. Other systems may use infrared light to detect heat changes, such as when a person (body heat) walks by the infrared sensors. If a person moves in the range of the motion sensors, the alarm (audible, visual, or silent) is activated.          Back To Top