ECH2O GS 1
Monitor more, spend less
The GS1 is a ruggedized version of our basic, no-frills soil moisture sensor. It accurately measures volumetric water content in soil or soilless media.
The longer lifetime of the GS1 helps your budget go further. It delivers research-grade accuracy at a price that makes large sensor networks economically practical. Characterize your site with sensors at multiple depths and locations, even on a tight budget.
Epoxy body withstands tough field conditions
This sensor is built to last longer in the field under warmer, wetter conditions. The epoxy body withstands harsh environments and water intrusion.
Stainless steel needles for easy installation
Two stainless steel needles cut through the soil for better soil-sensor contact and easier installation. Needles are also much more durable than our standard sensor blades.
Full VWC range & large volume of influence
The GS1 is sensitive across the entire water content range. It can be installed in dry desert soils or in very wet peat. Sensitive to small changes in water content anywhere from 0 – 100% VWC. Plus, it has one of the largest volumes of influence on the market—690 cm³.
70 MHz frequency capacitance technology
This frequency minimizes salinity and textural effects, making the GS1 accurate in most soil or soilless media. Can be used in a variety of conditions with the factory calibration.
Plug and log with METER data loggers
Install the GS1, plug it in to the EM60, set the measurement intervals, and start logging data. No programming required.
Database and graph measurements
Use this sensor with DataTrac 3 to quickly and easily store, access, and compare soil water content data from a large installation.
Compatible with many other loggers
The GS1 accepts a wide range of input voltages and has an easy-to-read voltage output. Voltage correlates to soil water content through a simple linear relationship, making this sensor easy to integrate into a wide variety of non-METER loggers.
Using a generic calibration: ± 0.03 m³/m³ (± 3% VWC) typical in mineral soils that have solution electrical conductivity < 10 dS/m. Using medium specific calibration, ± 0.01 - 0.02 m³/m³ (± 1 - 2% VWC) in any porous medium
0.001 m³/m³ VWC in mineral soils
0 to 57% VWC
|Volume of influence|
690 cm³ / See comparison article
10 ms (milliseconds)
VWC: Frequency domain
1,000 to 2,500 mV
-40°C to 50°C
3.0 VDC to 15 VDC (absolute maximum) @ 15 mA
Sensors come standard with 5 m cable. Custom cable lengths available. Maximum cable length of 75 m.
|Cable connector types|
3.5 mm "stereo" plug, or stripped and tinned lead wires (3)
5.1 cm x 2.4 cm x 2.1 cm
|Data logger compatibility|
EM60 Series, EM50 Series, Campbell Scientific, DataTaker
12 months, parts and labor
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.
Phone US: +1 509-332-5600
Phone Europe: +49 89 12 66 52 0