The TDR-310H is an integrated time domain reflectometer that combines ultra-fast waveform generating and digitizing functions with a precision 5 ps resolution time base and highly sophisticated waveform digitizing and analyzing firmware that provides true time domain analysis of soil-propagated waveforms.
Its form factor is designed for easy vertical installation in an augured hole using a 34 mm flat-bottomed auger. It mates with a 1 inch schedule 40 PVC
pipe that acts as a handle in its installation to any desired depth. Its main improvements over the 310S are its faster rise time, its shaped incident
wave, its lower power consumption and its very fast response time. Its interface is SDI-12 and is compatible with any data recorder that is compliant
with SDI-12 version 1.4.
Features:
- 3-element 10 cm stainless steel waveguide
- 34 mm round cross section with glue-on protrusion for mating with 1 inch schedule 40 PVC pipe
- 10 m 3-conductor waterproof cable
- Waterproof Epoxy-filled Housing
- 20% to 80% Incident Wave Rise Time: 150 ps
- Waveform Digitizing Resolution: 5 ps
Functions:
- Volumetric Water Content: 0% to 100%
- Medium Permittivity: 1 to 80
- Medium Bulk Electrical Conductivity: 0 to 5000 uS/cm
- Medium Temperature: -40 to +60 degrees C
- Pore Water EC (Hilhorst Model): 0 to 55000 uS/cm
Specifications
Permittivity Reporting:
- Reading Range: 1 to 80 relative permittivity units
- Reporting Resolution: 0.1 relative permittivity units
- Repeatability (RMS deviation): 0.07 permittivity units
- Reporting Accuracy (Coarse and medium textured soils): +/- 1 relative permittivity units
- Reporting Accuracy (Fine textured soils): +/- 2 relative permittivity units
- Stability of permittivity readings vs Bulk EC: less than 1 relative permittivity unit 0 to 4000 uS/cm BEC
Volumetric Water Content Reporting:
- Reading Range: 0 to 100% VWC
- Reporting Resolution: 0.1% VWC
- Repeatability (RMS deviation): 0.07%
- Reporting Accuracy (Coarse and medium textured soils): +/- 1 percentage point
- Reporting Accuracy (Fine textured soils): +/- 2.5 percentage points
- Stability of VWC readings vs Bulk EC: less than 1 percentage point 0 to 4000 uS/cm BEC
Bulk Electrical Conductivity Reporting:
- Reading Range: 0 to 5000 uS/cm
- Reporting Resolution: 1 uS/cm
- Repeatability (RMS deviation): 3 uS/cm
- Reporting Accuracy (0 to 1000 uS/cm): 25 uS/cm
- Reporting Accuracy (1000 to 2000 uS/cm): +/- 2.5%
- Reporting Accuracy (2000 to 5000 uS/cm): +/- 5%
Temperature reporting:
- Reading Range: -40 to +60 C
- Reporting Resolution: 0.1 degree C
- Repeatability (RMS deviation): 0.01 % C
- Reporting Accuracy: +/- 0.25 degrees C
