Visibility Sensor – RWS-30 (Biral)

The RWS-30 Visibility Sensor by Biral is a professional forward-scatter visibility sensor designed for accurate measurement of Meteorological Optical Range (MOR) and Extinction Coefficient (EXCO) in road weather stations, tunnels, highways, and transport safety systems. It is specially engineered for environments where visibility reduction caused by fog, smoke, exhaust fumes, dust, and pollution must be detected quickly to improve operational safety and traffic management. The sensor is widely used in Road Weather Information Systems (RWIS) and tunnel ventilation control systems. It offers a wide measurement range from 200 meters to 99.99 km with 1-meter resolution. Using forward scatter technology with 850 nm infrared light, the RWS-30 provides highly reliable visibility readings without being significantly affected by surrounding objects, flashing lights, or vehicle headlights. It complies with international tunnel guidelines defined by the PIARC Technical Committee, making it ideal for critical infrastructure monitoring. The system also includes window contamination monitoring with automatic correction, reducing unnecessary maintenance and ensuring long-term stable operation.