Sensor Switch CMR 10 Series incorporates Passive Infrared (PIR) technology into an attractive and economical line powered sensor toprovide maximum viewing from the ceiling. When mounted at 9 (2.74 m), this sensor views up to 28 (8.53 m) in all directions. Its circular coverage pattern is designed for walking motions; making it ideal for T-shaped intersections in corridors, or other areas where wall mounting a sensor is not practical. Low ceiling heights are also best covered with the CMR 10. For example, when mounted at only 7' (2.13 m), the height of pick aisles in many distribution centers, the CMR 10 provides a 32 (9.75 m) diameter pattern of coverage. For detection of minor motion is also required, the CMR PDT 10 Series Dual Technology sensor is recommended.