ECH<sub>2</sub>O EC-5

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Large network soil moisture sensing

ECH2O EC-5

Low cost individual sensors for large sensor networks

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

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.

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.

Easy integration

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

Reasons to pick the EC-5

  • Volumetric water content is the only measurement you need
  • Affordable
  • Simple sensor with excellent accuracy
  • Small volume of influence (eg., field spatial variability, lab column studies, or greenhouse research)
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Features

  • 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 EM60G data logger to collect data remotely

Specifications

Accuracy

Mineral soil:
±3% VWC, most mineral soils, up to 8 dS/m
±1-2% VWC with soil specific calibration
Rockwool: ±3% VWC, 0.5 to 8 dS/m
Potting Soil: ±3% VWC, 3 to 14 dS/m

Resolution

0.1% VWC (mineral soil)
0.25% VWC (rockwool)

Range

Calibration dependent; up to 0-100% VWC with polynomial equation

Dimension

8.9 x 1.8 x 0.7 inch

Cable length

Sensors come standard with 5 m cable. Custom cable lengths available. Maximum cable length of 40 m. Please contact METER if you need longer cable lengths.

Measurement time

10 ms

Power

2.5 - 3.6 V DC @ 10 mA. Output proportional to input voltage. 2.5 V and 3 V excitations supported with calibration equations

Output

Voltage, correlated linearly (soil) or polynomially (growing media) with VWC

Temperature

-40 °C to +50 °C

Connector types

3.5 mm "stereo" plug or stripped and tinned lead wires (3)

Data logger compatibility (not exclusive)

METER Em50/EM60G series, ProCheck, Campbell Scientific

Warranty

One year, parts and labor

Accessories

Support

Have a question or problem? Our support team can 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: support.environment@metergroup.com

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