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® Wall Switch Occupancy Sensor, Commercial, Series: WS Series, 120/277 VAC, 0 to 1200 W, 1/6 hp, Passive Infrared Sensor, 900 sq-ft Coverage, 180 deg Viewing, 30 s to 30 min Delay, LED/Tungsten Lamp, Flying Lead, Automatic On/Off, Manual On/Off Control Output, Surface Mount, 35 deg C, Plastic, Ivory, 2.68 in L x 1.75 in W x 1.04 in H

• Time delay adjustment from 30 sec up to 30 min
• Minimum to maximum sensitivity adjustment
• 0 to 1000 VA tungsten, ballast, E-ballast, LED driver, 1/4 hp motor load requirement for each relay at 120 VAC, 0 to 1200 VA ballast, E-ballast and LED, 1/4 hp motor load requirement for each relay at 277 VAC
• Complies with 2011 NEC requirements
• Zero crossing circuitry reduces stress on the relay and results in increased sensor life
• Adjustable time delay and sensitivity
• Custom 2-tier fresnel lens enhances detection at the desktop level
• Sensor coverage tested to NEMA guide publication WD 7 to 2000
• Light level sensor holds lights off when ambient lighting is above the preset level
• Patented voltage drop protection
• For safety, there is no leakage to load in the Off mode and sensor is safety grounded
• LED indicates occupancy detection
• Ballast E-ballast load type
• Turns lighting or fan loads on and off based on occupancy and ambient light level
• The sensor replaces existing wall switches and fits behind a standard decorator wallplate
• Optional neutral

• Specification Sheet https://assets.unilogcorp.com/2/ITEM/DOC/IDW_DOCUMENT_f245c481e4de162ec2af544625e9034389ac831b63d6c663c2191f84b84f1de6.pdf