Soil Moisture Sensor
TDR-315N
The TDR-315N is MUNRO’s flagship Soil Smart TDR moisture sensor. It has a much higher amplitude waveform than our H-series sensors, which consumes more power but makes it very effective in taking accurate measurements in challenging soil environments. Being part of the Soil Smart Series means that its advanced waveform analysis works with all mineral soil types. It is a complete integrated time domain reflectometer that combines ultra-fast waveform generating and digitizing functions with a precision 5 pico-second resolution time base and highly sophisticated waveform digitizing and analyzing firmware that provides true time domain analysis of soil-propagated waveforms. Its longer waveguides provide a very large sampling volume and high accuracy of the waveform propagation.
Its form factor is designed for shallower horizontal installations where it is pushed into the sidewall of a trench that has been dug to the desired measurement depth. A probe guide is provided to ensure that the waveguide rods are parallel when pushing them into the soil. It provides reading data through a 3-wire SDI-12 interface and is compatible with any data recorder that is compliant with SDI-12 version 1.4 and earlier.
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Description
The TDR-315N is MUNRO’s flagship Soil Smart TDR moisture sensor. It has a much higher amplitude waveform than our H-series sensors, which consumes more power but makes it very effective in taking accurate measurements in challenging soil environments. Being part of the Soil Smart Series means that its advanced waveform analysis works with all mineral soil types. It is a complete integrated time domain reflectometer that combines ultra-fast waveform generating and digitizing functions with a precision 5 pico-second resolution time base and highly sophisticated waveform digitizing and analyzing firmware that provides true time domain analysis of soil-propagated waveforms. Its longer waveguides provide a very large sampling volume and high accuracy of the waveform propagation.
Its form factor is designed for shallower horizontal installations where it is pushed into the sidewall of a trench that has been dug to the desired measurement depth. A probe guide is provided to ensure that the waveguide rods are parallel when pushing them into the soil. It provides reading data through a 3-wire SDI-12 interface and is compatible with any data recorder that is compliant with SDI-12 version 1.4 and earlier.
Features
• Designed for easy use in shallower horizontal applications
• MUNRO’s largest sampling volume with the wide spacing & the longer 15cm waveguides
• Highest accuracy MUNRO sensor configuration
• Soil Smart analysis works with all mineral soil types
• Incident Wave Amplitude: 2.3 V
• 20% to 80% Incident Wave Rise Time: 300 ps
• Waveform Digitizing Resolution: 5 ps
• SDI-12 Interface
• 3-element 15 cm stainless steel waveguide
• 5m or 10m 3-conductor waterproof cable (standard)
• Waterproof Epoxy-filled Housing.
Measurement Functions
Volumetric Water Content: 0% to 100%
Medium Permittivity: 1 to 85
Medium Bulk Electrical Conductivity: 0 to 3000 µS/cm
Medium Temperature: -40 to +55°C
Pore Water EC (Hillhurst Model): 0 to 55000 µS/cm.
