Take soil measurements anywhere for those applications not requiring a permanent soil monitoring system. Your Apple or Android device communicates wirelessly with the HydraGO using bluetooth.

Simply insert the probe into the soil, and tap the “Sample” button in the HydraMon app. The app will display soil moisture content, temperature, conductivity, and dielectric permittivity on-screen for immediate viewing. The date and time of each measurement is recorded along with the soil measurement data and the GPS location measured by your smartphone’s GPS receiver.

All data can be saved and emailed as a .CSV file for analysis in Excel. Notes and location names can be added to the data records.

The HydraGO features a rugged, engineered resin housing that contains a rechargeable battery good for a full day’s heavy use. It comes with a detachable ergonomic pole so it can be inserted without bending over.

HydraGO uses the same patented soil sensor as the HydraProbe.

Technical Specifications

Part No. 93633-010
Battery type Rechargeable NiMH battery, 3.6 V / 300 mAh
Wireless protocol Bluetooth
Housing Anodized aluminum with an acetal endpiece
Operating temperature 14°F to 149°F (-10°C to +65°C)
Soil probe Stevens HydraProbe (ratiometric dielectric coaxial impedance)
Soil tine assembly Marine grade stainless steel
Parameters measured Soil moisture, temperature, bulk electrical conductivity, dielectric permittivities
Dimensions Adjustable—70 cm to 153 cm including both the hiking pole and the sensor body
Sensor body is 20 cm in length including tines, 7.5 cm in diameter at the top of the main body
Moisture Range: From completely dry to fully saturated (from 0% to 100% of saturation)
Accuracy: ± 0.01 WFV for most soils, ± ≤0.03 max for fine textured soils*
Bulk electrical conductivity Range: 0 to 1.5 S/m
± 2.0% or 0.02 S/m whichever is typically greater*
Real dielectric permittivity (isolated) Range: 1 to 80 where 1 = air, 80 = distilled water
Temperature Range: -10°C to +60° C
Accuracy: ± 0.3° C


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Download the Stevens Soil Resource Guide

Written by the soil experts at Stevens, our soil resource guide contains a wealth of information and will benefit anyone involved with soil. Whether you’re a soil scientist, a farmer or a soil researcher, this 52 page book is a fantastic reference and source of up-to-date theories, practices and advice. 


Soil Geomorphology

Soil Properties

Salinity / Electrical Conductivity (EC)

Dielectric Permittivity

Soil Monitoring Applications

Soil Moisture and Irrigation

Soil Sensor Technologies

Soil Sensor Calibration

Sensor Accuracy

…and much more!

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