Th3 Soil Temperature Profile Probe

To measure the temperature profile in soils in six fixed depths.

Inside a tube made of glass-fibre reinforced plastic (GRP) 6 temperature sensor elements are placed in different depths. Each sensor element has direct contact to a stainless steel ring which is embedded into the tube's surface. This ensures that each sensor has direct contact to the soil.
The 6 sensors are placed in the depths 5, 10, 20, 30, 50 and 100 cm.

The probe is completely inserted into the soil until the top edge of the tube is on a level with the ground surface. The probe's cable will exit the tube in a depth of 8 cm and then is buried below the ground surface. Thus, thermal influences by the ambient temperature are excluded.

The Th3-v has analogue output signals 0 to 1 V corresponding to -20 to +50°C. Each depth requires an individual logger channel, thus 6 channels need to be available.
The Th3-v can be connected directly to the PR1/2 plug of the DL6 6-channel logger with an extension cable EC-8.

The Th3-s is available with a seriel tensioLINK/SDI12 output and a 4-pin plug.

Typical Applications

• Measurement of the temperature profile in soils

Advantages

• Measurement of 6 different depths with one probe only
• Depths according to WMO standard
• Highly precisive and quick measurement
• Serial RS485-tensioLINK/SDI12 2-wire version
• Analog version with 6 x 0...1 V standard signals
• Minimised soil disturbance
• No interference by ambient temperature
• Punctiform temperature pick-up
• Best thermal contact of the sensor elements to the soil
• Robust and maintenance free design
• Probes with individual depths available on request
• High-grade GRP tube with extremely firmness and durability, low water assimilation and low flow properties

Limitations

• Not suitable for usage as a insertion probe for spot readings

Technical Information

Included in Delivery

• Profile probe, manual