ARGUS occupancy sensors automate the switching or dimming of lights by detecting movement within a space. They bring you convenient and the easiest way to eliminate lighting-related electricity wastage in unoccupied areas of your home or office. They even automates motor load switching for A/C, fans, blinds and curtains. Passive Infrared (PIR), Dual-tech (PRI+Ultrasonic) and dimmable sensors are available for various applications. Passive Infrared (PIR) occupancy sensors detect motion by sensing temperature profile changes, which is suitable for detecting large body movements.