• 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 or silicon photomultiplier
    • Spectrum stabilization
    • Nuclide-specific data
  • On-board data storage
  • Wireless connection via WIFI and Bluetooth
  • Battery-powered


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

System Data

  • Size: 120mm diameter x 300mm length
  • Weight: 4000 gram (NaI), 4600 g (CsI), 5000 g (CeBr)
  • Housing: Carbon fiber; end caps: Anodized aluminum
  • Connectors: one 8-pin LEMO M-series
  • Environmental: 
    -20 0C to +85 0C; 
    IP68 protected
  • Power: 
    • Input range: 9-18V or 9-36V 
    • Power consumption max 5W
  • Data acquisition rate: single shot – 10Hz
  • Data storage capacity:
    • 32GB internal
    • 200 days of continuous measurement (at 1Hz)
  • Connectivity: user-configurable output streams over IP or serial link


The Medusa Radiometrics MS-700 product line of radiation detection systems comprises a line of low-power, lightweight and robust gamma-ray sensors made "for walking" or for drone-borne applications! The systems are fully self-contained as they integrate data acquisition, processing and storage into a single embedded system. The systems can be read-out via a mobile device like a tablet or smartphone. 


The system comprises a 3x6 inch CsI-based scintillation detector 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, or WiFi. Other crystal types (NaI, CeBr, BGO) are available on request. 

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. A GPS and PTH sensor (pressure, temperature and humidity) are integrated into the sensor.

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

System Operation - mDOS

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 having a maximum capacity of 32GB, yielding space  for over 4000 hours of continuous logging of data. The system can be user-configured to output gammaray spectra continuously, allowing to connect the sensor to multiple data acquisition systems. Check out mDOS!