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ECH20 EC-5 Soil Moisture Sensor



  • Brand: METER
  • Model: ECH20 EC-5
  • Product description: 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 an
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ECH20 EC-5 Soil Moisture Sensor Description:

User's Manual

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.


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

ECH20 EC-5 Soil Moisture Sensor Specification:

Volumetric Water Content(VWC) Range 0-100%
Resolution 0.001 m³/m³ VWC in mineral soils,0.25% in growing media
Accuracy Generic Calibration: ±0.03 m³/m³ typical in mineral soils that have solution EC <8 dS/m
Medium Specific Calibration: ±0.02 m³/m³ in any porous medium (± 2%)
Measurement Specifications Measurement Volume See comparison article
Communication Specifications Output 10%-50% of excitation voltage (250-1,250 mV at 2,500 mV excitation)
Data Logger Compatibility METER dataloggers(ZL6,EM50/60 series,Em5b) or any data acquisition Compatibility systems capable of switched 2.5-3.6 VDC excitation and single-endec voltage measurement at greater than or equal to 12-bit resolution
NOTE:Thesecalibration constants only apply to 2,500-mV excitation;use ofthese numbers with any other excitation voltage results in erroneous readings!
Physical Specifications Dimensions Length:8.9 cm (3.50in)
Width:1.8 cm (0.71in)
Height: 0.7 cm (0.28in)
Prong Length 5.0 cm (1.97 in)
Operating Temperature Range Minimum:-40.00°C
Typical: NA
NOTE:Sensors may be used at higher temperatures under certain conditions:contact Customer Support for assistance.
Cable Length 5 m(standard)
40 m (maximum custom cable length)
NOTE:Contact Customer Support if a nonstandard cable length is needed.
Connector Types 3.5-mm stereo plug connector or stripped and tinned wires
Electrical and Timing Characteristics Supply Voltage (VIN to GND) Minimum:2.5 VDC at 10 mA
Typical: NA
Maximum:3.6 VDC at 10 mA
Measurement Duration Maximum:10 ms
Other Compliance Manufactured under ISO 9001:2015
EM ISO/IEC 17050:2010 (CE Mark)


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