The gSMS is designed for stationary, long-term outdoor measurements. The data is uploaded to the cloud to give insight into the readings, used for monitoring of radionuclides and soil moisture. 

Stationary monitoring

gSMS what is in the box

1.5 kg

2x2'' CsI Crystal
Robust & shock-proof

700+ days interal storage 


-20 / + 65 C
Arctic and desert operation

Stationary measurements
Long term outdoor monitoring

Do you need more information on our sensors?

Contact us, we're ready to collaborate with you.

The Medusa gamma Soil Moisture Sensor (gSMS) records stationary radionuclide concentrations. The system is mainly designed for monitoring applications, in which it continuously records and uploads data to an online portal. This real-time data can be used to monitor radiation levels for security applications. 

A new soil moisture sensor

A revolutionary new way to derive soil moisture contents of an area that find applications in agricultural applications. The major advantage of this sensor over standard soil moisture sensors is the large field of view. The gSMS can give an average moisture content of an entire field.  

Leading in gamma-ray sensors

Leading in innovative gamma-ray solutions

Academic collaboration

Scientific collaboration with eminent research institutes and peer-reviewed publications of the analysis procedures. 


We have over 20 years of experience in developing gamma–ray spectrometers and applications. 

Gamma-ray spectrometer
Scintillation crystal 100 ml Csl
Mapping speeds Stationary
Recording frequency Up to 1hz
Online Radionuclide analysis 40K, 238U, 232Th and 137Cs (more on request)
Type uBlox ZED-P9P (optional)
Signals GLOSNASS, BeiDou, Galileo
Accuracy 1.5 m CEP
RTK accuracy <1 cm
Streaming RS-232, ethernet and Wi-Fi
Sensors Spectrometer, GPS, PTH, rain monitor
Internal storage 16 GB
Dimension 80mm ⌀ x 250 mm (l)
Weight 1.5 kg
Operating T -20 to +65 °C
IP rating IP65
Input voltage 5-35V
Power consumption 3W nominally (6W max) (and has a power saving mode)
Battery Solar powered (optional)
Wi-Fi 2.4 and 5 Ghz
Ethernet 100 Mbps
Port RS-232

mDOS & Gamman

medusa Detector Operating System (mDOS)

We offer a uniform interface across all our products. Whether conducting an airborne survey for mineral exploration, locating a lost source with a UAV, or utilizing our detector for a handheld survey to map the environment, you can rely on the same user-friendly interface. This software is specifically developed for in-the-field use, optimized for ease of use, and designed to automate your survey workflow.

GammAn post-processing software

For situations that require post-processing of data, a seamless connection with mDOS facilitates rapid reprocessing. The system is available with a graphical user interface and also as a set of command-line tools for both Windows and Linux, allowing you to integrate the analysis seamlessly into your existing workflow.

More about mDOS and GammAn

mDOS user interface