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