Take soil measurements anywhere for those applications not requiring a permanent soil monitoring system. Your Apple or Android device communicates wirelessly with the HydraProbe using an ad-hoc wi-fi radio link.

Simply insert the probe into the soil, and tap on the “Sample” button in the HydraMon app. The HydraGO Field Version communicates wirelessly with your smartphone or tablet using an ad-hoc wi-fi network created by the device itself.

The HydraGO Field Version is available with and without a survey-quality, sub-meter GPS receiver. When using a unit without an integrated GPS, the (less accurate) position measured by the smartphone is used when logging data.

The app will display soil moisture content, temperature, conductivity, and dielectric permittivity on-screen for immediate viewing. The GPS location, date and time of each measurement is recorded along with the soil measurement data. All data can be saved and emailed as a .CSV file for analysis in Excel.

The HydraGO Field Version features a rugged, anodized aluminum housing that contains a rechargeable battery that powers the connected HydraProbe and built-in wi-fi radio. It comes with a carry strap for easy on-the-go measurements.

Technical Specifications

Battery TypeRechargable NiMH Battery, 12V/2500 mAh
Wireless ProtocolWi-Fi (802.11b)
HousingAcetal material
Cable22 gauge, Jacketed
Operating TemperatureProbe: -10°C to +65°C ( 14°F to +149°F )
Case / Connectors:  0°C to +65°C ( 0°F to +149°C )
Water ResistanceProbe: tolerates continuous full immersion in liquid
Case / Connectors:  Weather resistant only.
Soil ProbeStevens HydraProbe (included) with weatherproof connector
Parameters MeasuredSoil Moisture,Temperature, Bulk electrical Conductivity, Dielectric Permittivities
Dimensions135.4mm (5.33") L x 121.6 mm (4.78")W x 47.9 mm (1.89") H
Weight ( case & probe )1.08 kilos (2.38 lbs.)
Part number93633-006 (w/o GPS), 93633-005 (w/GPS)


Download Stevens'
Product Catalog

Enter your name and email address to receive a link to the PDF version of the Stevens Product Catalog. You will be subscribed to the Stevens Water newsletter (you can unsubscribe any time).

Product Catalog download

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!

Soil Resource Guide Download
Get it!

Shop Online / Inquire

Need more information? We’re here to help!​

Tell us a bit about yourself and your question and we’ll get back to you ASAP.

General inquiry