The NIRS31-UMB is a non-invasive road weather sensor working with optical principle and is mounted several meters above the surface at bridges or masts.
It measures surface conditions such as wetness, ice, snow, or frost as well as water film heights, ice percentage in water and freeze point temperature. Through these measurements it generates the friction coefficient on the road or runway.
| Parameters measured: | Layer thickness of water, snow and ice, surface conditions (dry, damp, wet, snow, ice), friction, road surface temperature, saline concentration |
| Measurement technology: | Optical principle, pyrometer |
| Product highlights: | non-invasive, easy to install and add to existing measurement networks, friction measurement, real time data |
| Interfaces: | UMB-binary, SDI-12, ASCII-UMB, analog outputs in combination with digital-analog-converter DACON8-UMB |




