Ceiling Mounted Infrared Motion Sensor (occupancy detector, PIR, auto sensor) Ceiling Mounted Infrared Motion Sensor ((occupancy detector, PIR, auto sensor)1. Convenient Installation2. Identify day and night ... )4. Adjustable Time Delay:10±5sec~30±4min5. Detection motion speed:0.6~1.5m/s6. CE, GS Approval ... Diameter:90mm High:28mmWorking Humidity<93%RH Ceiling Mounted Infrared Motion Sensor