01 / Standard
TNode
0.01 °C resolution · ±0.1 °C base accuracy
Precision temperature & pressure profiles · Made in Germany
Thermistor strings.
Layer by layer.
The digital 2Wire sensor string delivers extremely precise temperature profiles in a smart, lightweight and ultra-low-power system.
01 / The system
Built for the profile your site demands.
Every sensor string is manufactured to your requirements. High-precision temperature and pressure sensors can be combined in line or star topology, while digital transmission avoids cable-related accuracy loss across configured networks of up to 500 metres.
50standard · up to 300 optional
100 mstandard · 250 m+ on request
500 mmaximum total cable length
5 bar50 m water column · higher ranges optional
02 / Digital sensor nodes
Three levels of precision.
One flexible bus.
Mix compatible sensor types on the same string and store calibration data directly at each measurement point.
02 / Extended
TNode EX
Pt1000 · 0.001 °C resolution · ±0.1 °C base accuracy
03 / High definition
TNode HD
Pt100 · 0.0001 °C resolution · ±0.05 °C base accuracy
Custom manufactured
03 / Why digital
Calibration stays with the sensor.
Thermistor and electronics remain at the same temperature, improving calibration stability. When a logger is exchanged, the string retains its own calibration data and continues to return consistent values.
- 01 Thin, lightweight two-wire cabling
- 02 Minimal heat flux along conductors
- 03 Individually calibrated measuring points
- 04 Sensor spacing from 15 cm; 10 cm possible at the first interval
04 / Applications
Temperature profiles for every ground.
From a borehole to a glacier, each installation receives the sensor layout, mechanical construction and data path it needs.
01
Water & ice
Temperature profiling in glaciers, lakes and oceans.
02 / Field insight
Permafrost
Long-term monitoring in soil and rock boreholes. Explore the annual thermal wave →
03
Dikes & dams
Thermal observation of wetlands and hydraulic structures.
05 / Connectivity
One 2Wire string.
Two ways to log.
The sensor string itself communicates over a digital two-wire protocol. At the cable end, choose a direct GEOprecision minilogger or convert the signal to SDI-12 for an open logger connection.
Version 1 · Direct
Native 2Wire connection
Connect directly to our minilogger.
The string plugs straight into a compatible GEOprecision minilogger. Logger housings are available in stainless steel or POM, depending on the installation.
- No separate protocol converter
- Compact, matched string-and-logger system
Version 2 · SDI-12
2Wire to SDI-12
Add a Type 410 converter.
The POM-housed Type 410 converts the string's two-wire protocol to SDI-12. The string can then be used with any SDI-12-capable data logger; GEOprecision LTX loggers are optimised for this setup.
- Standard SDI-12 interface on the logger side
- Bluetooth Low Energy for local setup and diagnostics
PDF request form
06 / How to order
Start your order with the 2W request form.
The completed form defines the string configuration we need for calculation, quotation and order processing. Please include the cable lengths, measuring-point positions, sensor types, accuracy and required interface.
- 01Download
Save the 2W request form as a PDF. - 02Configure
Enter all dimensions, sensors and connection requirements. - 03Email
Send the completed form to the contact for your region.
07 / Contact
Your regional contact.
For a quotation or order, email the completed 2W request form to the contact for your region. For general questions, you can also use the form on this page.
EU / Asia
GeoPrecision GmbH Am Dickhaeuterplatz 8D-76275 Ettlingen, Germany info@geo-precision.com
USA / Canada
CryoGeeks Distributor 78 George St #204Ottawa, ON K1N 5W1, Canada info@cryogeeks.com +1 (613) 209-6525 cryogeeks.com