The TDR200 is the core of Buraq Integrated Solutions’ time-domain reflectometry system, designed to accurately measure soil volumetric water content, bulk electrical conductivity, rock mass deformation, or other time-domain parameters. A single Campbell Scientific data logger can control multiple TDR200 units.
The TDR200 sends a fast electromagnetic pulse through a coaxial line and probe, then digitizes the reflected waveform. Travel time and reflection amplitude are processed to deliver precise measurements. The data logger captures a 250-point waveform in about two seconds, with optional extended waveforms (up to 10,112 points) for long-cable applications such as slope stability and rock deformation. Advanced filtering ensures accuracy in noisy environments.
| Measurements Made | Volumetric water content (VWC), permittivity, electrical conductivity (EC), and temperature |
| Operating Temperature Range | -40° to +60°C |
| Maximum Installation Torque | 54 N m (40 ft⋅ lb.) |
| Operating Voltage Range | 9 to 36 Vdc |
| Diameter |
|
| Maximum cable length | 304.8 m (1,000 ft) |
| Length | 0.55 m/1.05 m (21.5 in./41.2 in.) depending on the option ordered |
| Weight | 1.9 kg/3.6 kg (4.2 lb. /7.9 lb.) depending on the option ordered |
| Current Drain | |
| Active | ~64 mA (@ 12 Vdc) |
| Quiescent | ~1.5 mA (@ 12 Vdc) |
| Measurement depths | |
| 0.5 m Option | 5, 10, 20, 30, 40, and 50 cm (2, 4, 8, 12, 16, and 20 in.) |
| 1 m option | 5, 10, 20, 30, 40, 50, 60, 75, and 100 cm (2, 4, 8, 12, 16, 20, 24, 30, and 40 in.) |
| Electrical Conductivity | |
| Range | 0 to 10 dS/m |
Accuracy |
|
| Relative dielectric permittivity | |
| Range | 1 to 80 |
| Water content accuracy | ±1 permittivity unit (between 4 and 42 permittivity) |
| Soil temperature | |
| Accuracy | ± 0.15°C (between -30° and +40°C) |
| Volumetric Water Content | |
| Range | 0 to 100% |
| Water Content Accuracy |
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A full TDR setup includes the TDR200, SDM8X50 multiplexers, data logger, power supply, enclosure, and probes. PC-TDR software supports configuration, diagnostics, and program generation.
Measures VWC, permittivity, EC, and temperature
One sensor provides readings at six or nine depths
Quick, low-impact installation
Digital output compatible with most Campbell Scientific data loggers
Built for long-term outdoor performance
Trusted True-Wave™ TDR technology
The SoilVUE™10 integrates TDR circuitry with six or nine helical waveguides housed in a threaded body to improve soil contact and minimize air-gap errors. It measures dielectric permittivity and calculates volumetric water content using a mixing model.
Simple installation with a standard 5-cm hand auger
IP67 M12 detachable cable for easy replacement