PIR technology senses occupancy by detecting the difference between heat emitted from the human body in motion and the background space. Relying on a clear line-of sight view, passive infrared sensors make 100% coverage cut off possible. These sensors utilize a unique fresnel lens which divides the coverage area into zone, enhancing detection of small movement.

WattStopper®, CI-355, Ceiling Mount Occupancy Sensor, Line Voltage, 120/230/277/347 VAC, 0 to 1500 W Power, Passive Infrared Sensor, 1200 sq-ft Coverage, 360 deg Viewing, 5 to 30 min Time Delay, LED/Tungsten Lamp, 50/60 Hz Response, Flying Lead Connection, Automatic On/Automatic Off Control Output, NEMA 1 Enclosure, 35 deg C, Plastic, White, 4.5 in Dia x 1.45 in D Dimensions

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WattStopper_CI3551_Installation_Manual.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WattStopper_CI3551_Installation_Manual.pdf
• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WattStopper_CI3551_Specification_Sheet.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WattStopper_CI3551_Specification_Sheet.pdf

• Built-in light level sensor featuring simple, one-step set-up
• Zero-crossing for long relay life
• LED indicates occupancy detection
• DIP switch simplifies sensor adjustments
• Clip mounting system makes ceiling tile installation simple
• Detection Signature Processing eliminates false triggers and provides immunity to RFI and EMI
• Walk-through mode turns lights off 3 min after the area is initially occupied