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ECH20 EC-5 Tech Specs
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Technical Specifications

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
Communication Specifications
Output
10%–50% of excitation voltage (250–1,250 mV at 2,500 mV excitation)
Data Logger Compatibility
METER data loggers (ZL6, EM50/60 series, Em5b) or any data acquisition systems capable of switched 2.5–3.6 VDC excitation and single-ended voltage measurement at greater than or equal to 12-bit resolution.

NOTE: These calibration constants only apply to 2,500-mV excitation; use of these numbers with any other excitation voltage results in erroneous readings!
Physical Specifications
Dimensions
Length: 8.9000 cm (3.50 in)
Width: 1.8000 cm (0.71 in)
Height: 0.7000 cm (0.28 in)
Prong length
5.0000 cm (1.97 in)
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.
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: 2.5000 VDC at 10 mA
Typical: NA
Maximum: 3.6000 VDC at 10 mA
Measurement Duration
Maximum: 10.0000 ms
Other
Compliance
Manufactured under ISO 9001:2015
EM ISO/IEC 17050:2010 (CE Mark)
2014/30/EU
2011/65/EU
EN61326-1:2013
EN50581:2012
GSA