Auto Lift Arm ECO Wheel Tracker

The Auto Lift Arm ECO Wheel Tracker saves energy, is space efficient and can double daily testing output

Wheel tracking is used to assess the resistance to rutting of asphaltic materials under conditions which simulate the effect of traffic. A loaded wheel tracks a sample under specified conditions of load, speed and temperature while the development of the rut is monitored continuously during the test. Test specimens can be either slabs prepared with a laboratory compactor or 200mm Ø cores cut from the highway.
The CRT-WTECO-A™ wheel tracker performs both procedures A and B specified for the small scale device in EN 12697-22. Procedure A requires that six specimens are tested. For procedure B only two specimens need to be tested, but rut depth must be measured at more points along the longitudinal rut profile and the tests are longer. To speed up the testing process the CRT-WTECO-A™ was designed to test two specimens within one working day via a pre-programmable unique lift arm mechanism (European
Community registered design #: 001699042).


  • EN 12697-22 Small device
  • AGPT/T231 (supersedes AST 01)
  • T 0719
  • Key Features

  • Tests materials for roads with axle loads up to 13 tonnes
  • Fully programmable automated lift arm, enables up to twice the normal test throughput
  • Automated pre programmable sample conditioning
  • Small and compact for maximum energy efficiency, 28% saving over CRT-WTEN1
  • Integral temperature controlled cabinet with fully glazed doors
  • PID control of test temperature in the range 40°C to 62°C
  • Specimens compacted with the Cooper Technology Roller Compactor can be transferred directly to the wheel tracker without de-moulding
  • User-friendly Windows™ software
  • Supplied with UKAS accredited calibration certification
  • CE marked

  • Key Use

  • Determination of the rut resistance of asphaltic paving materials

  • Software

  • User friendly, intuitive and reliable Windows™ software developed using LabVIEW™
  • Programmable for auto start, enabling up to double daily testing output
  • Programmable sample conditioning to enable test to start prior to the working day
  • Software automatically starts the wheel tracker, maintaining the speed at the specified 26.5 cycles per minute
  • Measures rut depth and sample temperature automatically at regular intervals
  • The rut profile is captured automatically by the software and analysed to calculate the rut depth
  • A continuously updated on-screen graph shows rut depth versus time, along with the rut profile and temperature
  • Software stops the wheel tracker on completion of a test and prints a test report if required
  • Stored test data can be analysed and compared with other test data utilising a spreadsheet package
  • Utilities are included for transducer check, diagnostic routines and RTD calibration
  • USB PC link
  • Excel import data output
  • Auto Lift Arm ECO Wheel Tracker software

    Wheel Load 700N
    Mould Dimensions mm 305 x 305
    Wheel Speed 26.5 cycles per minute
    Slab Thickness mm 35 to 100
    Rut Depth Transducer Range mm 50
    Temperature Range 2100 x 616 x 2111
    Working space required mm (WxDxH) 2300 x 1616 x 2300
    Estimated Weight Kg 1000
    PC Included

    ¹ others available upon

    Calibration & Maintenance

    Calibration, Annual Service and Maintenance Contracts are available for this device. Please enquire for further details. Note: This device should be checked and calibrated annually.

    Accessories are not included in the price of main device (unless stated otherwise) and may be purchased separately if required.

    ¹ Please enquire for any other depths

    Steel and aluminium quick release mould for roller compactor or wheel tracker, 305 x 305 x 50mm deep¹
    Steel and aluminium quick release mould for roller compactor or wheel tracker, 305 x 305 x 100mm deep¹
    Photo? N.A CRT-INSERT-10
    Mould – Aluminium Insert 305 x 305 x 10mm – used to adjust mould depth¹
    Photo? N.A CRT-INSERT-5
    Mould – Aluminium Insert 305 x 305 x 5mm – used to adjust mould depth¹
    Split holder with steel base-plate for 200mm Ø core specimen
    Rubber wheel for Wheel Tracker for EN 12697-22
    Rubber wheel for Wheel Tracker for AGPT/T231(supersedes AST 01)
    Photo? N.A CRT-WTECO-MCS
    Mould Conditioning Shelf
    Photo? N.A CRT-EHEAT
    Additional heating element to increase temperature ramp rate. (Useful in low ambient temperatures)
    Please complete the form below to download the datasheet