BHP01 Transmission RVR Measurement Equipment uses the recognized laser with the most sensitive wavelength of human eyes as the transmission light source. On the basis of ICAO standard algorithm, by measuring the transmission attenuation of laser in the atmosphere, combined with the airport runway light intensity and atmospheric background brightness, accurately calculate the longest distance of airport runway pavement signs, runway boundary lights or center line lights that can be seen by pilots in the cockpit of aircraft on the runway. The system includes: laser transmitting end, optical receiving end and remote control end. The system can automatically measure the visual range of airport runway and airport visibility.