• High sensivity
  • Lightweight and rugged carbon housing
  • CsI scintillator for enhanced stability
  • Full spectrum recording
  • Automatic gain stabilization
  • Online nuclide-specific count rates

Radiation Sensor

  • CsI crystal, other crystal types on request
  • Dedicated Spectrum Processing Unit comprising
    • 2048 channel MCA,
    • HV supply
    • Spectrum stabilization
    • Nuclide-specific data
  • On-board data storage
  • Wireless connection via WIFI
  • Battery-powered


  • On-board data logging
  • Set-up, control and viewing of data via built-in webserver


The Medusa Radiometrics MS-1000/2000 UAS product line of radiation detection systems comprises a line of low-power, lightweight and robust gamma-ray sensors developed with unmanned aerial vehicle (UAV) applications in mind. The systems are fully self-contained as they integrates data acquisition, processing and storage into a single embedded system. 

System Operation

The system is designed for minimum operator interaction. It provides various views on the data streams while being acquired, allowing for online system checks. The system has an embedded data storage of 4GB which is expandable to a maximum capacity of 32GB, yielding space  for over 4000 hours of continuous logging of data. The system can be user-configured to output gamma-ray spectra continuously, allowing to connect the sensor to multiple data acquisition systems.

System Data


Housing: Carbon fiber
End caps: Anodized aluminum

Connector: 8-pin LEMO M-series

-40 0C to +85 0C
Waterproof: IP68 protected

Input power:
9-18V or 9-35V

Power consumption: max 6W

Data acquisition rate: up to 10Hz

Data storage capacity:

4GB internal
Expandable to 32GB.

20 days of continuous measurement (at 1Hz)

user-configurable output streams over IP or serial link


Size: 120mm  x 400mm (L)
Weight: 6150 gram (NaI), 7000 g (CsI)


Size: 120mm  x 600mm (L)
Weight 12 kilogram


The system comprises a 3.5x6.5 inch (1L) or 3x5x13inch (2L) CsI-based scintillation detectors connected to a tailor-made spectrum processing unit. This unit comprises a single PCB containing HV supply for the detector, 2048-channel MCA and a data processing/storage board. The board communicates via cable and WiFi.

The unit runs a dedicated webserver that provides access to the multiple functions of the device, i.e.

  • Set-up of the system;
  • Status view to inspect data and functioning of the system;
  • Single and continuous measurement modes;
  • Download view to allow retrieval of recorded data.

This webserver can be accessed via any standard webbrowser platform.

The system can be integrated into modern DAS systems, like the Geoduster DAS. This way, spectrometer data can continuously be logged and combined with other sensors like GPS and elevation meters.

The data is stored in records containing energy-stabilized gamma ray spectra, together with count rate and activities of 40K, 238U, 232Th and 137Cs. Other radionuclides can be added on request