TBTLWD-1 Light Weight Deflectometer (LWD)

TBTLWD-1 Light Weight Deflectometer (LWD)
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TBT Light Weight Deflectometer LWD is a portable version of FWD, with loading cell & geophones, it can be used to test asphalt pavement & railway subbase, the data get from LWD can be used to calculate the strength of multiple pavement layers.

Technical Parameters
  • Loading device
    • Hammer:10.0kg (optional 15kg, 20kg)
    • Maximum drop height: 700mm
    • Maximum impact loading:20kN
    • Pulse loading shape: Half sine
    • Wave pulse loading duration:15~30ms
    • Material: galvanized alloy steel
    • Weight:15kg (including 10 kg hammer)
    • Height:1100mm
  • Loading board
    • Diameter:300mm (optional 200, 450mm)
    • Thickness:20mm
    • Material:galvanized alloy steel
    • Weight:15kg
  • Electronic Settlement (wireless control)
    • Loading force measurement range:25 kN
    • Loading force measurement accuracy:<2%
    • Displacement measurement range:2mm
    • Displacement measurement accuracy:< 1%
    • Measurement time per point:<1 minute
    • Sensors for displacement measuring:3pcs (expandable)
    • Data storage capacity:2000 group test data
    • Power supply:Lithium battery
    • Continuous working time:12 hours
    • Working environment temperature range:-10 ~ 40°C
    • Working environment humidity range:not more than 85% RH (no condensation)
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