Vaisala Road / Runway Surface and Depth Sensor DRS511

Several measurements combined compactly in one sensor:

• Surface Temperature Sensor
• Ground Temperature Sensor at 60mm depth
• Additional Depth Temperature Sensor at 300mm 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 35mm
• Can be installed in wheel track