The 1L-PS01 360Ceiling Mount PIR Motion Sensor is a high clarity lighting automation device engineered for effective motion detection and energy management. Designed by a trusted Sensor Manufacturer, this model combines a modern sensitivity detector with a dependable united circuit system to provide the perfect blend of ease, safety, automation, and energy savings. The 1L-PS01 operates on passive infrared (PIR) detection technology. PIR Motion Sensors identify changes in infrared radiation reduces by the human body. When a person moves within the sensing field, the variation in infrared energy triggers the sensor and activates the load immediately.