Soil Moisture Sensor


The EC-5 delivers research-grade accuracy at a price that makes large sensor networks economically practical. You can adequately characterize your site with soil moisture sensors at multiple depths and locations, even if you’re on a tight budget.

A photograph of the ECH20 EC-5 soil moisture sensor

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Engineered for accuracy

The EC-5 determines volumetric water content (VWC) by measuring the dielectric constant of the media using capacitance/frequency domain technology. Its 70 MHz frequency minimizes salinity and textural effects, making this sensor accurate in almost any soil or soilless media. Factory calibrations are included for mineral soils, potting soils, rockwool, and perlite.

METER is trusted by

Brigham Young University
Temple University
Colorado School of Mines

A photograph of a side view of the ECH20 EC-5

Easy installation

Just 5 cm long with a ~0.2 L measurement volume, this handy little sensor is easy to install in the field and can also be used in nursery pots. The EC-5’s compact design makes it easy to push directly into undisturbed soil to ensure good accuracy.

A photograph of the ECH20 EC-5 next to the ZL6 data logger

Easy integration

The EC-5’s analog signal means no-hassle integration with systems manufactured by other companies.

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Feature summary

  • Measures volumetric water content
  • Affordable: ideal for large sensor networks
  • Simple sensor with excellent accuracy
  • Small volume of influence (eg., field spatial variability, lab column studies, or greenhouse research)
  • 70 MHz frequency minimizes salinity and textural effects
  • Factory calibrations included for mineral soils, potting soils, rockwool, and perlite
  • Small size means easy installation
  • Plug and play capability
  • Easy integration with other systems
  • Use with ZL6 data logger to collect data remotely

Water Content Features

wdt_ID wdt_created_by wdt_created_at wdt_last_edited_by wdt_last_edited_at Features TEROS 10 TEROS 11 TEROS 12 TEROS 54 ECH20 EC-5 ECH20 10HS
1 Measures volumetric water content X X X X X X
2 Measures temperature X X X
3 Measures EC X
4 Depths measured simultaneously 1 1 1 4 1 1
5 Individually normalized X X X
6 Can install manually X X X X X
7 ariel.dearth 21/05/2024 02:06 PM ariel.dearth 21/05/2024 02:06 PM Install tool available TBIT TBIT TBIT TEROS 54 Install Tool N/A N/A
8 Install via borehole or trench Either Either EIther Borehole Either Either
9 Quickest install/removal X
10 Maintenance-free X X X X X X
11 Compatible with verification clip X X X
12 Volumetric water content accuracy - generic calibration ±0.03 m³/m³* ±0.03 m³/m³* ±0.03 m³/m³* ±0.05 m³/m³* ±0.03 m³/m³* 0.00 - 0.57 m³/m³*
13 Volumetric water content accuracy - medium specific calibration ±0.01–0.02 m³/m³** ±0.01–0.02 m³/m³** ±0.01–0.02 m³/m³** ±0.02–0.03 m³/m³** ±0.02 m³/m³** N/A
14 Analog vs digital Analog Digital Digital Digital Analog Analog
15 Uses capacitance technology X X X X X X
16 Maximum measurement volume 430 mL 1010 mL 1010 mL 300 cm³ per segment 240 mL 1320 mL
17 Connects to ZENTRA X X X X X X
18 ariel.dearth 21/05/2024 02:04 PM ariel.dearth 21/05/2024 02:04 PM LEARN MORE TEROS 10 TEROS 11 TEROS 12 TEROS 54 ECH20 EC-5 ECH20 10HS
19 * Generic calibration - typical in mineral soils that have solution EC
20 ** Medium specific calibration - in any porous medium
Features TEROS 10 TEROS 11 TEROS 12 TEROS 54 ECH20 EC-5 ECH20 10HS

A photograph of the ECH20 EC-5

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