Soil moisture is highly variable. Accuracy from a single site isn't enough to run an experiment. To make good soil moisture measurements, you need research quality probes and you need a lot of them.
Decagon's soil moisture sensors are research grade probes at a price that lets you completely characterize your site.
Plug-and-log with the Em50 line of data loggers or integrate into other logger systems (including Campbell Scientific).
|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*|
|RANGE||0 - 100% VWC||0 - 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.|
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.
Install sensor into augered hole or a sidewall. Use the insertion tool to create a pilot hole before inserting the sensor in hard or rocky soils.
Phone: 800-755-2751 or
The 10HS measures volumetric water content in a larger soil sample with its 1 liter volume of influence. High frequency oscillation and patented signal filtering deliver excellent accuracy and minimal textural effects; analog output makes it easy to use with other companies' data loggers including those manufactured by Campbell Scientific. This 10 cm long probe works best when installed in the field. » Learn more
Get temperature data integrated with your soil moisture data—at the same location and over the same measurement intervals. Ideal for adding temperature to each node in your network. Serial and SDI-12 communication options come standard with each 5TM, giving plenty of options for integrating into systems manufactured by other companies (such as Campbell Scientific). » Learn more
Our full-featured soil moisture sensor. Measures volumetric water content, temperature, and electrical conductivity in soil. This three-pronged, 5 cm long sensor is for use in soil only. High frequency oscillation and patented signal filtering deliver excellent accuracy with minimal textural effects. Serial or SDI-12 communication options come standard with each 5TE, giving lots of options for integrating into systems manufactured by other companies (such as Campbell Scientific). » Learn more
A moisture sensor for soilless substrates such as rockwool, potting soil, peat, and perlite. The GS3 measures water content, temperature, and bulk electrical conductivity. Its stainless steel needles have an extended surface area to optimize EC measurements and minimize substrate disturbance during insertion. The GS3 comes standard with both serial and SDI-12 communication; you can plug and log with Decagon data loggers or integrate with other systems (including those manufactured by Campbell Scientific). » Learn more