GS1 Soil Moisture Sensor

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.

Monitor More, Spend Less

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. Characterise 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 Water Content Range

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.

Reasons to Pick the GS1

  • You need an inexpensive soil moisture sensor that lasts a long time
  • You need to measure VWC only in a harsh environment
  • You are setting up a large-scale network of soil moisture sensors

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 Decagon Data Loggers

Install the GS1, plug it in to the Em50, 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,

Measurement Time 10 ms (milliseconds)
Range 0-100% VWC
Resoultion 0.001 m3/m3 VWC in mineral soils
Accuracy ±0.03 m3/m3 in typical soils, up to 8 dS/m
With soil-specific calibration: ±0.01 to 0.02 m3/m3
Power Requirements
3.0 VDC to 15 VDC (absolute maximum) @ 15 mA
Output: 1,000 to 2,500 mV
Operating Enivornment Temperature -40 to 50°C
Physical Properties Dimensions 8.9 cm x 1.8 cm x 0.7 cm
3.5 mm "stereo" plug or stripped and tinned wires (3)
Cable 5 m Standard, Custom cable lengths available upon request
Warranty: One year, parts and labour

We periodically send an email newsletter containing updates, new product releases, training and advice. If you would like to receive these please subscribe below.

Non UK/Ireland Customers

Non UK/Ireland Customers, please contact Decagon Devices at:

GS-1 Volume

GS-1 in Soil

Click here for the Soil Sensors Comparison Page.

GS-1 Manual
Size: 321.0 KB (328,703 bytes)

GS1 & GS3 Quick-Start Guide
Size: 1.1 MB (1,139,833 bytes)

Environmental Catalogue
Size: 2.5 MB (2,581,813 bytes)

Quotation Request

Email us to request a quotation for the GS1 Soil Moisture Sensor