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

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WattStopper_WS301B_Catalog.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WattStopper_WS301B_Catalog.pdf
• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WattStopper_WS301B_Installation_Manual.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WattStopper_WS301B_Installation_Manual.pdf
• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WattStopper_WS301B_Specification_Sheet.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/WattStopper_WS301B_Specification_Sheet.pdf

• Custom two-tier Fresnel lens enhances detection at the desktop level
• Light level sensor holds lights off when ambient lighting is above the preset level
• Patented voltage drop protection
• Zero crossing circuitry reduces stress on the relay and results in increased sensor life
• Adjustable time delay and sensitivity