Vaisala Bridge Surface Sensor DRS511B
Several measurements combined compactly in one sensor:
- Surface Temperature Sensor
- Ground Temperature Sensor at 60mm depth
- Depression of Freezing Point / Chemical Amount
- Black Ice Detection
- Surface State; (water / ice layer thickness, presence of snow)
- Dry
- Moist
- Wet
- Frost
- Ice
- Snow
- Trace (Moist & Treated)
- Wet & Treated
- Alarms and Warnings
- Rain Warning
- Frost Warning
- Ice Warning
- Ice Alarm
- Thermally passive principle - does not disturb the measured surface
- Thermal properties matched to road properties
- 3cm wide so thermal characteristics adjust to match the road very quickly - improved accuracy
- Robust epoxy design; the sensor may wear down by as much as 10mm
- Can be installed in wheel track
