WHEEL TRACKER – WTIM-A
Robust. Repeatable. Reliable.
The Hamburg dual arm wet and dry wheel tracker is widely used to evaluate the resistance to rutting and moisture susceptibility of asphalt mixtures.
Our WTIM-A is fully compliant with the latest AASHTO-T324 and EN 12697-22 standards and future-proofed, as well as being energy efficient.
From routine quality control to advanced research projects our WTIM-A is the perfect solution for you.
True Sinusoidal Motion
Our Scotch yoke mechanism produces perfect sinusoidal motion throughout the stroke in full compliance with major international standards. This results in consistent, repeatable, and reproducible test results.
Our data acquisition system precisely records rut depth in 230 points across the sample. The load can be set from 520N up to 1600N in 1N increments. Variable test parameters and flexible analysis tools are included to suit any research project and future changes in the standards.
Our machine is a smart solution for quality control. The focus during design was to optimise workflow and testing time. With our automatic test scheduling tool and preconfigured standard test routines, the operator will save time planning and executing tests.
An eco-friendly smart heating system and highly accurate temperature control with three temperature probes help reduce power usage.
New and easy-to-use guard and extra emergency stop buttons with easy access from any side protect the users to the highest level. Electromechanical automatic arms reduce heavy lifting demands from the operator.
- Both preconfigured and fully flexible test profile configurations
- Multiple test routines, which include AASHTO, EN, BS, AGPT, TxDOT, and CalTrans
- Multi-language capability in the test software and test reports. Reports can be configured to a specific language and specific test method
- Automatic final rut profile screenshots at the end of the test
- The reporting tool can be installed on any networked or remote PC
CT 389 2020
- Automatic and constant rut depth recording at 230 points across the sample allows for flexible analysis, future proofs against new changes in the standards, produces more accurate results across bigger data samples, provides the possibility to evaluate surface characteristics, i.e., roughness
- Scotch yoke mechanism for perfect sinusoidal motion throughout the stroke – with our WTIM-A further improved to an industry-leading RMSE of 0.039mm. Our machine’s performance has been independently verified in the NCHRP Report 
- Wheel load 700N/703N/705N as standard, adjustable from 520N to 1600N in 1N increments.
- Wheel speed is variable from 10 to 36 cycles per minute
- Three temperature probes as standard to ensure uniform temperature distribution across the sample and in the test chamber, temperature control accuracy of 0.1º C 
- Fully flexible test profile configuration and automatic test performance on one or two specimens.
- Test scheduling timer to optimise testing time
- UKAS calibration certificate issued when applicable
- Auto filling and levelling of the water tank, two automatic settings in compliance with EN and AASHTO standards
- Automatic and independently lifting electromechanical arms allow maximum access for mould insertion and removal for user comfort
- The new design of the dry hood allows quick and easy switching between wet and dry tests
- Universal mould clamping system, suitable for any compatible mould size required by standards
- Mould sizes available: 305*305mm, 260*320mm, 305*400mm, cores 200mm diameter, double cores 150mm diameter, with specimen height up to 100mm variable in 10mm increments
- No extra parts are required to change between different mould sizes
- Increased operator safety with three emergency stops connected to a fully integrated safety circuit.
- Quick-release panels for easy maintenance
- Superpave Testing
- Balanced Mix Design
- Quality Control
- Resistance to rutting
- Moisture susceptibility
- Recycled material studies
- Environmental studies
- Resistance to abrasion
- Pothole evaluation
- Road markings evaluation
 Why is sinusoidal motion important? Find more information in this white paper
 Cooper Hamburg Wheel Tracker temperature uniformity testing. Find detailed report on temperature analysis here
 Performance enhancement of asphalt patch repair with innovative heating strategy. Read article here
If you are interested in performing research in a new field that isn’t covered above, contact us, we like a challenge!
|Wheel travel||230 mm|
|Wheel speed||Variable from 10 to 36 rpm|
|Temperature range water||ambient to +70°C|
|Temperature range air||ambient to +65°C|
|Rut depth measurement||
LVDT 50mm range, positioned in line with the wheel to ensure accurate measurement of the rut.
Max rut depth 25mm
|Accepted sample size|
|Slabs||305 x 305 mm, 260 x 320 mm and 305 x 400 mm|
|Double cores||150mm diameter|
|Height||Up to 100mm|
|Temperature probe resolution||0.01|
|Temperature probe accuracy||±0.2|
|Water bath temperature control accuracy||±0.1|
|Accuracy throughout the sample under test in air||±0.7|
|Max rut depth||25|
|Water heaters 2x||3000W|
|Safety lock||Fully integrated safety circuit|
|High-frequency proximity sensor for speed control||4mm operating distance|
|Weight & Dimensions|
|Net Weight Kg||640 (approx.)|
|Dimensions (WxDxH) cms||150 x 140 x 152|
230V Single Phase, 50/60Hz
230V Three Phase, 50/60Hz
Mains water supply with isolation valve (no more than 1 bar required)
Means to drain the water from the machine (10m hose supplied)
HS Code: 90311000
Shipping Dimensions (WxDxH): 170 x 160 x 163 cms
Shipping Weight: 950 Kg