The FSP-211B is an IP66 rated motion sensor that dims lighting from high to low based on movement. Three configurations are available. The FSP-211B mounts inside the fixture and the PIR lens connects to the FSP-211B through a 1.30”diameter hole in the bottom of the fixture. The FSP-211B-S mounts to a fixture/enclosure with a 1/2” knock out, via a nipple on the back. TheFSP-211B-D has a drop mount nipple, for mounting on to a pole, or to a fixture. The sensor uses passive infrared (PIR) sensing technology that reacts to changes in infrared energy (moving body heat) within the coverage area. Once the sensor stops detecting movement and the time delay elapses, lights will go from high to low mode and eventually to an OFF position if it is desired. Sensors must directly “see” motion of a person or moving object to detect them, so careful consideration must be given to sensor luminaire placement and lens selection. Avoid placing the sensor where obstructions may block the sensor’s line of sight. The FSP-211B operates single phase at 120V/230V/240V/277V. No power pack is required. It is designed to be installed in indoor and outdoor environments.

See Spec Sheet


    • Input voltage: 120/277VAC; 50/60Hz
    • Load ratings:
      • 120VAC 0-800W tungsten, ballast, LED driver; 1/6hp motor
      • 230-240V 0-300W ballast, LED driver
      • 277VAC 0-1200W ballast, LED driver; 1/6hp motor
    • Relay life rating
      • 200,000 cycles (120/277VAC)
      • 50,000 cycles (230VAC)
    • High mode: 0-10V; default 10V
    • Low mode: Off, 0-9.8V; default 1V
    • Time delay: 30 sec., 5-30 min.; default 5 min.
    • Cut off delay: none, 1-60 min. 1-5 hrs.; default 1 hr.
    • Sensitivity: none, low, med, max; default max
    • Setpoint: none, 1-250 fc, auto; default disabled
    • Photocell On/Off: 1-250 fc; default disabled
    • Ramp up time: none, 1-60 sec.; default none
    • Fade down time: none, 1-60 sec.; default none
    • Lead length: 30” (76 cm)
    • Operating temperature: -40 to 167°F (-40 to 75°C)
    • Dimensions:
      • Body, no nipple, 4.13”L x 2.32”W x 1.29”H; –
      • S body 5.5”L x 2.32”W x 1.36”H;
      • D body 5.71”L x 2.32”W x 2.79”H
      • Collar (all models), 1.3”dia. x 0.64”
    • UL and cUL listed (E101196)
    • Five year warranty

    Fixture Ordering Information

    MSFSP211BWattstopper FSP-211B Bi-Level PIR Motion Sensor
    FSPL2Lens Module For FSP-211 48’ Diameter From 8’ Mounting Height
    FSPL3Lens Module For FSP-211 40’ Diameter From 20’ Mounting Height
    FSPL7Lens Module For FsSP-211 100’ Diameter From 40’ Mounting Height
    FSIR100Wattstopper FSIR-100 Wireless Configuration Tool For FSP-211/HBP-111