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Vaisala Road / Runway Surface & 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
 

Temperature measurement

 

  • Measurement range -40°C...+60°C
  • Pt-100 elements, 1/3 Calass B DIN IEC 751
  • Four wire connection

Water layer thickness measurement



 

  • Measurement range 0...8mm
  • Accuracy 0.1mm (in the range of 0...1mm)
  • Three acrylic optical fibres in epoxy mould

    • Electrical measurements

     

  • Carbon fibre electrodes in epoxy mould
  • Two electrodes for conductivity and polarizability measurement
  • Six electrodes for surface capacitance

    • Available standard cable lengths

     

    20, 30, 50, 100, 150 or 200m

    Dimensions

  • 75mm x 84mm x 30mm (bottom 38mm)
  • Wear tolerance 35mm

    • Weight including 50m cable

     

  • 3.1kg

    • For complete specifications, please see the brochure or manual in "Product Documentation".

    This page was printed from www.vaisala.com on Sep 7, 2008
    URL: http://www.vaisala.com/weather/products/weatherinstruments/surfacesensors/surfaceanddepthsensor