First, the infrared detectors on the radio model specifications:
1 naming BBH-xx
Thunder from the king of outdoor products alert on the radio series of two-beam
2, two-beam model specifications BBH-20 / 30 / 40 / 60 / 80 / 100
Outdoor warning from a 20 m / 30 m / 40 m / 60 m / 80 m / 100 m

Second, the infrared detectors on the radio and principles of composition
1, the two-beam active infrared detectors on the radio by the emitter (T) and by the optical device (R) of two parts.
2, double-beam active infrared detectors on the radio by the emitter emits two beams of infrared light emitter and receiver at the other end received by the cast light emitted infrared radiation energy, and through the optical into electrical signals, the signal had been properly treated and then sent to the alarm control circuit.
3, because infrared light is not visible, so the emitter and by the light between a form one person saw a different blockade, when people pass through or block the two-beam active infrared detectors on the radio emitted infrared light, by the light output of the signal will change to start the alarm control alarm number.