The NIRS31-UMB is a non-invasive road weather sensor with optical measuring principle. It is mounted at masts or bridges up to 50 ft distance to the measurement spot on the road and can even monitor bridges. It measures surface conditions such as surface temperature, wetness, ice, snow, or frost as well as water film heights and calculates additional parameters like ice percentage in water, freeze point temperature and generates the friction coefficient on the road.
Non-invasive measuring principle
Representitive measurement of the road condition
High-quality road condition parameters for comprehensive description