TEROS-32 tensiometer for soil water potential


  • Low cost, easy to install, METER Group tensiometers
  • Read with a handheld meter or connect to a data logger
  • SDI-12 output for digital devices such as LoRaWAN and NB-IoT
  • Outputs soil water potential and soil temperature
  • Ideal for field, lab or soil column installations

TEROS-32 sensors measure the soil water potential and soil temperature. TEROS-32 applications include measuring soil water availability, controlling irrigation, and measuring soil–water storage.


tensiometer tension

The tensiometer is, indisputably, the most accurate way to directly measure water potential in the wet range. But measuring with a tensiometer is complicated. Most tensiometers require sophisticated wiring and complex data logger programming skills to even get them up and running, not to mention the constant maintenance, checking, and refilling. Now there’s a new way. Introducing the TEROS 32.

TEROS 32 is a simple, plug-and-play tensiometer that combines METER’s legendary German precision engineering with the power of ZENTRA Cloud, giving you easier, faster, more accurate water potential data in near-real time. Just install it and plug it in. It’s that easy. With ZENTRA Cloud software, you can review data as it happens from the comfort of your office, ensuring every tensiometer is working as expected. No more worrying if your tensiometer has cavitated. Combine the TEROS 32 with the TEROS 12, and you’ll know the best time to go out and refill. Plus, you can use both sensors to generate in situ moisture release curves.


more robust, if that’s even possible

Twenty-five years of tensiometer experience and fanatical attention to detail have made METER tensiometers practically bulletproof, but the TEROS 32 is more robust than ever before. Technological advancements have made it possible to incorporate a more ruggedized, highly precise pressure transducer, giving you higher data resolution in an almost unbreakable form, and making the TEROS 32 more affordable than its predecessors. Plus, the ceramic and shaft are engineered to be virtually indestructible when it comes to harsh weather (10-year warranty on the ceramic), which means the TEROS 32 is a tensiometer you can rely on year after year in every season.


spend more time on what matters

We think you should spend less time fussing with complex installations, and more time on your research. That’s why unlike most tensiometers, the TEROS 32 is now plug and play. Just insert the stereo plug into the ZL6 data logger, and start seeing numbers. The TEROS 32 connects to the ZENTRA Cloud system, where all data are connected and delivered through the cloud. Pull up your data instantly wherever you are, and you’ll know exactly when it’s time to refill, before trekking out to the field.


faster field visits

To save you even more time and effort, we’ve outfitted the TEROS 32 with an external refilling tube. No more pulling the tensiometer out of the ground. When it’s time to refill, the TEROS 32 can be filled externally without ever having to remove it, saving you hours of tedious maintenance. On top of all that, the tensiometer is highly responsive. It reacts much faster to changing soil conditions than lower-quality tensiometers, enabling you to measure even the most minute changes in soil water potential. Plus, it measures both positive and negative pore pressure.


accuracy has never been this easy

At METER, we know tensiometers. We’ve sold over 20,000 across the span of a quarter century, so we’re confident that if you need a precise, easy-to-use, reliable field tensiometer with outstanding year-round performance, you can rely on the TEROS 32. More usable, robust, and precise than other tensiometers, it provides superior quality data in near-real time and remains one of the most reliable instruments in the world for year-round outdoor monitoring.


connect to the ZL6 or your own data logger

The TEROS-12 is a highly versatile sensor and is compatible with a range of data loggers. Connect the TEROS-12 to the ZL6 data loggers for hassle free monitoring. Data can be accessed from the ZL6 directly or remotely via the internet with the ZENTRA Cloud platform.

Alternatively, Edaphic Scientific can connect the TEROS-12 to the ES-SYS monitoring system with a range of other sensors including sap flow, dendrometers, canopy temperature and weather sensors.

Or, the TEROS-12 comes with SDI-12 digital output so that you can connect it to your own, existing data logging system.


whole system monitoring solutions

Edaphic Scientific is a one-stop shop for a whole system monitoring solution. We provide plant and soil monitoring systems for researchers and growers including wireless, LoRaWAN and modem options.

Our systems not only support dendrometers, but related sensors such as sap flow, soil moisture, weather parameters, and more.

At Edaphic Scientific we want to work with you from the start of your project through to its completion. We can provide:

  • Assistance with project and experimental design
  • Procurement of all monitoring equipment, including sensors, data loggers and data management software. Edaphic Scientific is a one-stop shop where we can source and find any necessary equipment for your project from our preferred suppliers or third party suppliers
  • Installation and training
  • On-going assistance with data interpretation and equipment maintenance
  • Data correction and analysis, including statistical analysis with the R-package
  • Report and publication preparation including tables, figures, graphs, and manuscript writing


advanced data collection and management solutions

Edaphic Scientific recognises the need for flexible and adaptable sensor and data logging solutions for experimental or environmental monitoring projects.

Data can be downloaded directly in the field from data loggers. A direct connection between the data loggers and your computer, via a USB cable, can be used for manual downloading of data.

Alternatively, data can be downloaded over the internet on your iPhone, iPad or desktop computer with the Eagle.io cloud-based, data management software solutions. Through this remote based downloading capabilities, you can download, view and manage your data, and system, anywhere in the world and at anytime.


feature specification
tensiometer specifications
Measurement Range –85 to +50 kPa
Measurement Resolution 0.0012 kPa
Measurement Accuracy ±0.15 kPa
temperature sensor specifications
Measurement Range –30 to +60 °C
Measurement Resolution ±0.01 °C
Measurement Accuracy ±0.1 °C between -20 and +40 °C (±1 °C outside of this range)
general specifications
Output SDI-12
Lengths 40.0 cm 80.0 cm 120.0 cm Diameter: 2.5 cm
Operating Temperature Minimum: -30 °C (0 °C for water-filled tensiometer) Maximum: 50 °C
Materials Ceramic: Al2O3 , bubble point 1,500 kPa Shaft: PMMA Corpus: POM GF Refilling tubes: Stainless steel
Cable Length 5m (standard) | 75m (maximum)
Compliance Manufactured under ISO 9001:2015 EM ISO/IEC 17050:2010 (CE Mark) 2014/30/EU 2011/65/EU
Warranty 1 year

manual & docs

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