Spectrometer-dosimeter of gamma-radiation "Rhythm-S"


  • registration of gamma-ray spectra and identification of radionuclides;
  • measuring radionuclide activity in building materials, mineral raw materials, waste products, food stuff and other materials in the Marinelli geometry (without transferring to a laboratory);
  • quick measuring of radionuclide activity in the "2π" geometry (without sampling); • remote measuring.

As a dosimeter, the device is designed for:

  • detection of gamma-ray sources and radiation-contaminated materials;
  • monitoring of transport vehicles crossing national borders;
  • monitoring of radioactive contamination in scrap metal;
  • measuring gamma-exposure rate in the field and in production environment.

Delivery set:

gamma survey meter "Rhythm-1M"; spectrometric transducer; Bluetooth data transmitting module; notebook (or netbook); Bluetooth USB module; specialised software; power-supply and battery-charge units; miniature headphone; instruction manual. Each component of the gamma-ray spectrometer/dosimeter "RHYTHM-S" has independent power supply.

Technical specifications:

  • Relative energy resolution for 0.662 MeV 137Cs gamma-ray line, max. - 9%.
  • Working range of gamma-ray energies: 0.05 - 3 MeV.
  • Working range of equivalent gamma-ray dose rate: 0.01 - 19990 µSv/h.
  • Limits of basic relative error: ± 15%.
  • Energy dependence: ± 20%.
  • Sensitivity: 800 s-1/µSv/h (for 137Cs).
  • Adjustable measuring time: 0.5, 1, 2, 10, 50 sec.
  • Detector material: NaI(Tl) Ø40x40.
  • Hermetic design of the detector block.
  • Sound alerts with changing modulation.
  • The dosimeter is vibration and shock resistant. Max. peak acceleration: 150 m/s2.
  • Operating temperature range: -30...+50oN.

Dosimeter "Rhythm-1M" DBG-02 has passed the Government Acceptance Test.

Portable gamma-ray spectrometer / dosimeter "RHYTHM-S" is meteorologically certified.

From 2011 on, the spectrometer "Rhythm-S" will be equipped with a Bluetooth module capable of transmitting data over a distance of up to 100m, i.e. the computer is connected with the point of measuring wirelessly, which allows to be located at a greater distance from dangerous sources of radiation thus reducing the dose received.


Laboratory spectrometric appliance ATOLL.


  • registration of gamma-radiation of the samples of building materials, food and other liquid and dry substances;
  • measuring of spectral characteristics of the sources of radiation and automatic identification of radionuclids;
  • determination of activity of the revealed radionuclids;
  • determination of activity of the natural radionuclids.


spectrometric modulus, detectoring block with scintillation detector, low background protection of detectoring block, Marinnelly vessels, set of operating documentation.

The main characteristics:

Distinctive features