Looking for a basic, no-frills soil moisture sensor? Look no further than the EC-5, a sensor that accurately measures water content in any soil or soilless media with minimal salinity and textural effects.
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.
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.
Just 5 cm long with a 0.3 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 robust design makes it easy to push directly into undisturbed soil to ensure good accuracy.
The EC-5's analog signal means no-hassle integration with systems manufactured by other companies, such as Campbell Scientific.
Part number 40593 (Stereo), 40581 (Pigtail), 40578 (Custom)
±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
0.1% VWC (mineral soil)
|Range||calibration dependant; up to 0-100% VWC with polynomial equation
|Dimensions||8.9 x 1.8 x 0.7 cm|
||5 m, custom cable lengths available upon request|
||2.5 - 3.6 V DC @ 10 mA. Output proportional to input voltage. 2.5 V and 3 V excitations supported with calibration equations|
||Voltage, correlated linearly (soil) or polynomially (growing media) with VWC|
||-40°C to +50°C|
||3.5 mm "stereo" plug or stripped and tinned lead wires (3)|
|Decagon: Em50 series loggers, ProCheck, ECH2O Check, Em5b
Campbell Scientific: CR10X, 21X, 23X, CR1000, CR3000, etc.
Other: Any data acquisition system capable of switched 2.5 to 3.6 V excitation and single ended voltage measurement at 12 bit or better resolution.
||One year, parts and labor|
|ANALOG SENSORS||DIGITAL SENSORS|
|MEASURES||volumetric water content, dielectric permittivity||volumetric water content, dielectric permittivity||volumetric water content, dielectric permittivity, temperature, electrical conductivity||volumetric water content, dielectric permittivity, temperature, electrical conductivity||water potential,
|VOLUME OF INFLUENCE||0.3 L||1 L||0.3 L||0.3 L||0.3 L||N/A|
|DATA LOGGER COMPATIBILITY||Em5b, Em50, Em50R, Em50G, ProCheck, ECH2O Check, Campbell Scientific*||Em5b, Em50, Em50R, Em50G, ProCheck, ECH2O Check, Campbell Scientific*|
|Measurement RANGE||0 to 100% VWC||0 to 53% VWC|
|BEST IF||VWC is all that you need.
You're establishing a large sensor network.
|You want a large volume of influence.||You are managing salts in your system.
You want to use SDI-12.
|BUT NOT IF||You cannot apply a regulated voltage (only applies to non-Decagon data loggers).||You are measuring in nursery pots.
You are installing in rocky soil.
|N/A||You want to monitor soiless substrates or potting soils.||You are doing downhole installations.||You want to monitor soils at or near saturation.|
|SENSOR||CAMPBELL COMPATIBILITY||OTHER LOGGERS||OUTPUT||VOLTAGE REQUIREMENTS|
|EC-5||CR10X, 21X, 23X, CR1000, CR3000, etc.||Any data acquisition system capable of switched 2.5 to 3.6 V excitation and single ended voltage measurement at 12 bit or better resolution. (Note: some people take their chances with resolution as low as 3 bits, but resolution lower than 10 bits will leave the data quite choppy).||Voltage, correlated linearly (soil) or polynomially (growing media) with VWC||2.5-3.6 V|
|10HS||CR10X, 21X, 23X, CR1000, CR3000, etc.||Any data acquisition system capable of 3-15 VDC excitation and single ended voltage measurement at 12 bit or better resolution.||Voltage correlated with VWC, independent of excitation||3-15 V|
|5TE||Any logger with serial I/O (CR10X, CR850, CR1000, CR3000, etc.)||Ask a Decagon representative for an integrator’s guide to interfacing the 5TE||Digital ASCIII stream or SDI-12||3.6-15 V
|5TM||Ask a Decagon representative for an integrators guide to interfacing the 5TM||Digital ASCII Stream or SDI-12||3.6-15 V
|GS3||Ask a Decagon representative for an integrators guide to interfacing the GS3||Digital ASCII Stream or SDI-12||3.6-15 V
|MPS-2||Ask a Decagon represenative for an integrators guide to interfacing the MPS-2||Digital ASCII Stream or SDI-12||3.6-15 V|
For use with deep installation of the ECH2O probes. Includes a regular and sand auger (2.75" [7 cm] diameter), two 2' (0.6 m) extension rods, a standard rubber handle, and a ratchet handle.
Give your cables a higher level of protection from the elements and rodents. Also organizes your cables as you run them to your datalogger.
Phone: 800-755-2751 or