Simple Soil Moisture Sensing


If you think big, you’ll love this nearly bulletproof sensor

Large sensor networks have always made a substantial hole in the research budget, especially because many soil moisture sensors have issues with reliability. Not only that, traditional sensors force researchers to choose between accuracy and affordability. Not anymore. The new, ultra-robust TEROS 10 soil moisture sensor delivers scientific accuracy and reliability at a price that makes large sensor networks economically practical.

Everything you need. Nothing you don’t.

The TEROS 10 is a ruggedized version of our basic, no-frills soil moisture sensor. Its 70-MHz frequency minimizes salinity and textural effects, making it accurate in most soil or soilless media. With a tough, epoxy body, the TEROS 10 is designed to withstand some of the harshest field conditions, which means problem-free measurements over the longevity of your research. In fact, we’re so confident about the long life of our TEROS sensor line, we’ve increased our standard warranty from one to three years.

Long-lasting precision that’s short on cost

The TEROS 10 sensor lets you characterize your site with sensors at multiple depths and locations, even on a tight budget. It’s built to last longer in the field under harsh conditions. No more worrying about surprise data gaps due to failed sensors. It’s one of our toughest soil moisture sensors, and its body withstands difficult environments for up to 10 years. Ideal for large sensing networks, it is sensitive to small VWC changes across the entire range of soil and substrate water content and can be installed in anything from dry desert soils to very wet peat. Not only that, the TEROS 10 has very low power consumption and a high resolution.

Faster, better installation

More than just a sensor, the new TEROS 10 eliminates common problems that cause uncertainty in the data—things like air gaps and preferential flow. How? The TEROS 10 is compatible with the TEROS Borehole Installation Tool which mistake-proofs installation. Because of its mechanical advantage, the tool delivers consistent, flawless installation into any soil type (even hard clay) while minimizing site disturbance. Sensors are installed straight in and perpendicular with no side-to-side movement, then gently released to prevent air gaps and preferential flow. This means the TEROS 10 delivers more accuracy with less uncertainty than similar sensors on the market. And, with improved high-quality, sharpened, and securely fastened stainless steel needles, the TEROS 10 glides into any soil.

Simple integration. Simplified data collection.

The analog signal from the TEROS 10 sensor ensures that it can be easily integrated into a wide variety of non-METER systems. Or, simply plug the TEROS 10 into any METER data logger, and start collecting data. It’s that easy. No wiring. No programming. Combine the TEROS 10 with the new ZL6, where all data are connected and delivered through the cloud. Collect data in near-real time from the comfort of your office, or anywhere in the world.

Monitor more, spend less

If you’re planning a large sensor network and want more measurements for less investment, without compromising accuracy or reliability, then plan to use the easy, affordable, and ruggedized TEROS 10 soil moisture sensor.

Request a quote Contact us Compare all 3 TEROS sensors


  • Low-cost, ruggedized soil moisture sensor
  • Ideal for large sensor networks
  • Sharpened stainless steel needles are securely fastened and reduce breakage
  • Compatible with TEROS Borehole Installation Tool ensuring fast, error-free installation with little site disturbance
  • 3-year long-life guarantee
  • Check installation or troubleshoot with the ZSC Bluetooth sensor interface
  • Measure VWC in a harsh environment
  • Robust epoxy body means it lasts for 10+ years in the field
  • 430 mL volume of influence
  • Repeatability can be checked with an accuracy verification standard
  • Plug and play with METER data loggers
  • Ferrite core eliminates cable noise
  • Easy integration with third-party systems
  • See comparison of all TEROS water content sensors—>


View GSA details


Volumetric water content (VWC)

Mineral soil calibration: 0.00–0.64 m3/m3
Soilless media calibration: 0.0–0.7 m3/m3
Apparent dielectric permittivity (εa): 1 (air) to 80 (water)

NOTE: The VWC range is dependent on the media the sensor is calibrated to. A custom calibration will accommodate the necessary ranges for most substrates.

0.001 m3/m3
Mineral soil calibration: ±0.03 m3/m3 typical in mineral soils that have solution EC <8 dS/m
Soilless media calibration: ±0.05 m3/m3 typical in media that has a solution EC <8 dS/m
Medium specific calibration: ±0.01–0.02 m3/m3 in any porous medium
Apparent dielectric permittivity (εa): 1–40 (soil range) , ±1 εa (unitless) 40–80, 15% of measurement

Measurement volume

See comparison article

Dielectric measurement frequency

70 MHz



1,000 to 2,500 mV

Data logger compatibility

Data acquisition systems capable of switched 3.0–15 VDC excitation and single-ended voltage measurement at greater than or equal to 12-bit resolution.



Length: 5.1 cm (2.02 in)
Width: 2.4 cm (0.95 in)
Height: 7.5 cm (2.95 in)

Needle length

5.4 cm (2.11 in)

Cable length

5 m (standard)
40 m (maximum custom cable length)

NOTE: Contact Customer Support if a nonstandard cable length is needed.

Cable diameter

0.165 ±.004 (4.20 ± .10 mm) with min. jacket of .030 (.76 mm)

Connector types

3.5-mm stereo plug connector or stripped and tinned wires

Stereo plug connector diameter

3.50 mm

Conductor gauge

22 AWG/24 AWG drain wire


Supply voltage (VIN to GND)

Minimum: 3.0 VDC
Typical: NA
Maximum: 15.0 VDC

Operating temperature range

Minimum: –40 °C
Typical: NA
Maximum: 60 °C

NOTE: Sensors may be used at higher temperatures under certain conditions; Contact Customer Support for assistance.

Measurement duration

Minimum: 10 ms
Typical: NA
Maximum: NA


Manufactured under ISO 9001:2015 EM ISO/IEC 17050:2010 (CE Mark) 2014/30/EU and 2011/65/EU EN61326-1:2013 and EN55022/CISPR 22

California requires the following notice:

⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov

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Have a question? Our team is ready to help!

We manufacture, test, calibrate, and repair every instrument in house. Our scientists and technicians use the instruments every day in our product testing lab. No matter what your question is, we have someone who can help you answer it.

Email Europe: sales.europe@metergroup.com

Phone US: +1 509-332-5600
Phone Europe: +49 89 12 66 52 0

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