STELZNER® agricultural measurement systems

Measuring instruments for soil moisture and water monitoring, using sensors, tensiometers and data loggers

TDR 350

Soil moisture and conductivity meter TDR 350

The TDR 350 is a measuring instrument for determining the moisture content in soil based on TDR (time domain reflectometry) and the conductivity of the soil. The temperature can also be measured on the ground surface (optional).

This device has an integrated data logger for approx. 50,000 measurements and can optionally be equipped with a GPS module. This allows custom maps to be created that map the geographical coordinates of the soil moisture results. The data can be exported to a USB flash drive, smartphone or tablet. It can also be exported via the optional Bluetooth. The TDR 350 comes delivered with a case.

30005083 TDR 350 € 1660,05
In delivery: The TDR 350 with matching carrying case; please order the pair of probes separately
Art.-Nr. Article Accessories Cart
30005089 Probe pair, 20 cm € 80,92
30005095 Probe pair, 3.8 cm € 73,78
30005096 Probe pair, 7.5 cm € 76,16
30005097 Probe pair, 12 cm € 78,54
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Measuring range:

volumetric soil moisture
0 to approx. 50 vol.%
Conductivity: 0 to 5 mS/cm
Temperature: -30 to +60 °C

Resolution: volumetric soil moisture: 0.1 vol. %
    Conductivity: 0.1 mS/cm
    Temperature: 0.1 ℃
Accuracy: volumetric soil humidity: ± 3 vol.% (< 2 mS/cm)
Conductivity: ± 1 mS/cm
Useful probe length: 3.8/7.5/12 or 20 cm
Probe diameter: 0.5 cm
Measurement storage:  approx. 50,000 data records
Power supply: Four 1.5-V AAA batteries


The penetrometer is used to precisely determine the soil density. The stainless steel probe is scaled to mark the soil depth. The display features an easy-to-read colour scale. Plants living in dense soils can only absorb a limited... ...more Topseller

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