Biral’s range of Visibility and Present Weather sensors as well as the innovative BTD-300 Thunderstorm Detector are used worldwide in the most demanding applications such as aviation, offshore platforms and wind energy. Our visibility and ambient light sensors form the core of RVR monitoring, and our present weather sensors provide automated precipitation classification and monitoring that forms a vital part of the METAR signals broadcast to aircraft in the airport vicinity. Our BTD-300 Thunderstorm Detector has been developed to be compliant with FAA regulations for lightning detection systems used at airfields.