The Hubbell Bryant MSP1500C Passive Infrared (PIR) Occupancy Sensor detects long-range major motion from the ceiling mounted device. It also includes Bryant's Adaptive Technology which allows you to install and forget, saving time and money from not having to do constant adjustments. This technology also helps eliminate false-offs and disturbances. The Dual element passive-infrared detector and lens sense heat in motion. The ceiling mounted sensor is concealed in an off-white ABS enclosure that blends in with ceiling tile. Passive infrared (PIR) technology senses occupancy by detecting the movement of heat emitted from the human body against the background space. Unlike Ultrasonic technology, PIR sensors require an unobstructed line-of-sight for detection. These sensors use a segmented lens, which divides the coverage area into zones. Movement between zones is then interpreted as occupancy. PIR sensors are ideal for detecting major motion (e.g. walking), and they work best in small, enclosed spaces with high levels of occupant movement. The Bryant 360°, 1,500 Square Foot PIR Occupancy Sensor is also available with 360°, 450 Sq Ft coverage, sold separately.
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