Moisture Retention Curve System, 5 bar and 15 bar Application Range

UGT Full Range Tensiometer FRT 15D-SM

The UGT Full Range Tensiometer FRT 15D not only measures the water tension and the soil temperature, but also the soil moisture. You can also use the tensiometer stationary in the field for long periods of time. The low energy consumption in the measuring mode and the hardly necessary maintenance make the polymer tensiometer a perfect companion for your research.

  • Measurement of water tension, soil temperature and soil moisture
  • Fast response
  • Maintenance free
  • Low power consumption

Item no.: 1080160 (15D-SM)
Item no.: 1080150 (15D)

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Moisture Retention Curve System, 5 bar and 15 bar Application Range

What can the Full Range Tensiometer do?

The Full Range Tensiometer covers the entire water tension range relevant for plants, up to 1500 kPa depending on the design. In contrast to other systems for this measuring range, it does not determine the water tension indirectly as a derived variable but via a direct pressure measurement. It reacts quickly to changes in the suction tension. A pressure range of 1000 kPa is passed through in a few minutes. Even after drying out over the measuring range, the measurement is continued independently as soon as the humidity increases again. No filling is necessary.

Another advantage compared to other measuring instruments for the complete plant-relevant suction range is the low energy consumption (20 mA current in measuring mode). This makes the Full Range Tensiometer particularly suitable for remote measuring locations where regular maintenance and reliable power supply are not guaranteed. Data transmission via RS485 allows communication even in environments with increased risk of electromagnetic interference and over longer distances.

Technical Specifications

Parameter

Specification

Dimensions

Ø25 mm

Length FRT 15D: 150 mm

Length FRT 15D-SM: 157 mm

Measuring tip

cylindrical

Cable length

5 m potted

Tension measuring range

-100 … 1500 kPa

Accuracy over the measuring range ±35 kPa,

Temperature range during calibration 4 … 30 °C (at 100 % water saturation)

Temperature measuring range

-40 … +80 °C

Accuracy ± 0.2 %, resolution 0.01 °C between 0… +40 °C

Soil mositure measuring range

only FRT 15D-SM

0…40 % (0…100 % with limited accuracy)

Accuracy ± 5 % / accuracy after specific calibration ±3 %,

resolution 0.1 %  

Power supply

 

Current consumption

6 mA in measurement mode;

FRT 15D: max. 10 mA

FRT 15D-SM: max. 22 mA

Supply voltage

FRT 15D:

  • 5… 15 V for serial numbers up to 2021
  • 5… 30 V for serial numbers from 2022

FRT 15D-SM: 4… 24 V DC

Interface

 

Output signal

RS485 (Modbus protocol)

Environmental conditions

 

Operating temperature

+1 … +40 °C (ambient soil temperature)

Possible pH value in operation

pH 2 … pH 10

Transport sleeve

 

Diameter

25 X 65 mm

Material

soft PVC

Downloads

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Product Catalog

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