Medusa MS-350 gamma-ray spectrometer


The MS-350 is designed for hand-held surveys. However, it is also successfully used as an ultralight drone-borne system. With its weight below 3 kg, it is well-suited for smaller drones. 


MS-350 in case

2.7 kg
Maximized weight efficiency 

3x3'' CsI crystal
Robust & shock proof

500 hours
Internal storage

IP67 waterproof

-20 / + 65 C
Arctic and desert operation

Up to 15 km/h
Typical survey speed

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Drone-borne and hand-held survey
The MS350 is primarily designed for hand-held (walking) surveys. However, it is also being used successfully as a drone-borne system. With its weight below 3 kg, it is well-suited for smaller drones. 

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. 

Youtube video
Gamma-ray spectrometer
Scintillation crystal 350 ml Csl
Mapping speeds Up to 15 km/h
Recording frequency Up to 5hz
Online Radionuclide analysis 40K, 238U, 232Th and 137Cs
Type uBlox ZED-P9P
Signals GLONASS, BeiDou, Galileo
Accuracy 1.5 m CEP
RTK accuracy <1 cm
Streaming RS-232, ethernet and Wi-Fi
Sensors Spectrometer, GPS, PTH
Internal storage 16 GB
Dimension 100 (⌀) x 215(L) mm
Weight 2.7 kg
Operating T -20 to +65 °C
IP rating IP65
Input voltage 5-35V
Power consumption 3W (avg), 6W (max)
Battery Up to 8 hours
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