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First infrared

First passive infrared

Acts as a passive sensors detect infrared energy (PIR - passive infrared). Sensors detects the presence of human vision by its induction of the human body temperature, skin temperature, which is usually around 93 degrees F, radiate infrared energy with a wavelength ranges from 9 to 10 Micrometers. Meanwhile, sensors, according to standards that can touch the wavelength range from 8 to 12 Micrometers. It is often applied in a narrow space. First infrared often mounted on walls or ceilings, indoors or outdoors, monitoring space that it "watch. If people go into any area he valid, it will transmit signals to the control panel and then will alarm horn.

First Photoelectric infrared beam (optical beam power)

Includes two parts are attached at two positions away from each other (from 2 m to 50 m, 100 m, 200 m). A first device is light, there is also the first device to receive light. In normal conditions, the receiving device always receives light signal light beam emitted from the light-emitting devices. When someone goes through, cross-section beams, signal interruption, it will record and alarm. This is usually used as a fence monitoring.

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