DOT600

Roadbed Water-Content Meter

The DOT600 Roadbed Water-Content Meter is used in construction applications to measure volumetric and gravimetric water content of samples of earthen material in roadbeds and foundations. Portability, along with quick and accurate measurements, make the DOT600 a valuable tool for evaluating roadbed material both at the construction site and in the soil-test lab.

To make a measurement with the DOT600, the operator fills the sample chamber with soil and weighs it on the built-in scale to get a wet sample weight. The operator then compresses the soil in the chamber and triggers a measurement. The measurement result includes gravimetric and volumetric water contents, wet and dry bulk densities, sample volume, and applied force. Approximate time for one measurement is 90 seconds.


Features

  • Allows operators to monitor:
    • Roadbed volumetric and gravimetric water content
    • Sample bulk density and compaction force
    • Sample volume and weight
  • Measures volumetric water content (VWC) with a resolution of better than 1.0% VWC and a precision of better than 0.5% VWC
  • Provides a typical accuracy of ±2% VWC
  • Makes one measurement in approximately 90 seconds
  • Generates a measurement report that can be easily imported into spreadsheets
  • Completely portable system

Specifications

  • CR850: refer to CR850 product brochure
  • Battery
    • Type: 2.9 Ahr rechargeable sealed lead-acid
    • Standby Charge Retention at 20°C for One Year: 95%
    • Lifetime: ~500 cycles with discharge to 50% followed by recharge
  • Scale
    • Capacity: 1000 g (35.3 oz)
    • Accuracy: ±0.05 g (±0.002 oz)
    • Repeatability: 0.02% FS
  • Water Content Measurement
    • Resolution: 1% volumetric water content (resolution is the minimum change in the measured parameter, water content, that the sensor can repeatedly detect)
    • Precision: 0.75% volumetric water content (precision is the expected range for repeated measurements on the same sample.)
    • Accuracy: refer to DOT600 product brochure
  • Sample Volume and Applied Force Measurement
    • Sample Volume: ±1.5% for compressed sampled with thickness between 0.400 in. to 1.000 in.
    • Sensitive Volume: electromagnetic field penetrates the sample 0.39 inches. Sensitive volume is about 3.5 in3.
    • Applied Pressure Range: 0 to 45 psi
    • Applied Pressure Measurement Accuracy: 1.7 psi