Product Introduction

Like TDR-315L, it is a true waveform digital time domain reflectometer that can derive soil dielectric constant and moisture content based on the propagation time of electromagnetic pulses transmitted along its waveguide. TDR-315LExquisite design, precise measurement, and high cost-effectiveness. Compared to traditionalTDRCompared to other products (such asThe TDR100 Time Domain Reflectometer System and TDR-315L are already included in the small sensor bodyA super fast rising time step function generator, a waveform digital converter（200 GSPS and a picosecond resolution time base (5ps)It no longer requires large and complex system console components, eliminates bandwidth limited coaxial cables, and reduces90-97% of the equipment cost can be said to be, TDR-315LThis typeThe "TrueTDR" probe is a huge innovation in TDR soil water measurement equipment.

Additionally, due to TDR-315LIt is a true time-domain device（TrueTDR）， Their readings are not derived from the amplitude and relationship of current and voltage, so they are not affected by soil conductivity and compaction.andTDR-315L uses the standard SDI-12 interface, which is almost compatible with allhaveSDI-12 communication function data collector or recorder is very suitable for system integration.

Product Performance

ØVolumetric moisture content（0 to 100%, resolution of 0.1%)

ØCapacitance rate（1 to 80, 0.1 unit resolution)

Ø soil conductivitya. K. a. Bulk EC (0 to 5000 μ S/cm - resolution depends on reading range)

ØSoil temperature（-40 to+60 degrees Celsius, 0.1 degree resolution)

ØPore water conductivity（0〜55000μS/ cm）

Ø features:10 meters, flexible, water-resistant

Ø15cm X 3.5mm stainless steel ternary waveguide

ØDurable and waterproof epoxy resin shell

operation parameter

Ø Reading time:0.7 seconds

Ø Voltage requirements:6 to 15 volts DC

Ø Idle current consumption:<35 μ A @ 6 to 15 VDC

Ø Read current consumption:170 mA @ 6 to 15 VDC

Ø TDR-315L idle energy consumption: 15 J @ 6 VDC per day

Ø Read energy consumption:At 6 VDC, read 0.7 J each time, and at 12 VDC, read 1.4 J each time

Ø VWC and dielectric performance specifications: The dielectric constant of VWC conversion method=proprietary dielectric mixture model has a range of 0 to 100%.

v Closely followTop Equation up to 46% VWC.

Ø Accuracy of capacitance rate report: Full scale± 1%, ranging from 1 to 80 units of relative dielectric constant

v followConductivity from 0 to 4000 μ S/cm volume (in soil)

v follow-From 20 ° C to+50 ° C, but the dielectric constant of water changes significantly in the solid state compared to the liquid state. Therefore, VWC readings only report liquid water.

Ø Accuracy of volumetric moisture content report: depends on soil type, but typically± 2 percentage points.

v Bulk EC changes from 0 to 4000 μ S/cm, with a change of less than 1 percentage point

v With compactionVWC changes only with the variation of soil volume.

Ø Temperature performance specifications: Temperature is measured using precision thermistors. The thermistor is located on the external waveguide rodWithin 2mm, it enters the epoxy resin shell.

Ø Temperature report performance: typical± 0.2 degrees Celsius, worst-case scenario ± 0.5 degrees Celsius -12 to+50 degrees Celsius

Ø Conductivity performance specifications:EC is calculated from the long-term (200 ns) amplitude of the reflected wave using a geometric parameter called the "waveguide constant". This constant is exported in the factory during the factory calibration period.

Ø EC report accuracy: ± 1%, ± 35 μ S/cm maximum error from 0 to 5000 μ S/cm Bulk EC.

v Please note that,A 1% error is applicable to higher EC values, while a 35 μ S/cm error is applicable to very low EC values.

v pore waterEC is calculated from the Hilhorst model and represents all soils using the average pore size. Therefore, its accuracy is not indicated. Reading does provide a 'ballpark' indicator of the salinity of water in soil, rather than soil/water mixtures or 'bulk EC' properties.

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If you need to learn more about the product details, you can contact the sales personnel of Xi'an Saimo Rui Environmental Technology Co., Ltd. The contact information can be found at the bottom of the website.