Single Beam Photoelectric Detector Infrared Sensor 1 Pair

Size (Each One): 7.5 x 4.8 x 3cm/3'' x 1.9'' x 1.2'' (L*W*T); Operating Temperature: -20°C to 70°C; Shape (Each One): Half Egg Shaped; Package Content: 1 Pair x Active Infrared Detector 1 x English Usage Manual 1 Bag x Install Tools; This is Active Infrared Detector. Install each pair at the opposite positions. Then there is a infrared area between these two detector parts. When someone passes the infrared region, the detector will send alarm signal to the security alarm host (which not included here); Install Distance(Max.)in the above chart means the maximum install distance between the two detector parts; Great to be installed for security system in school, office building, hosipital, home yard, etc; Detecting range can be reduced to 30% in bad weather conditions, like rain, dust, etc.