Triathler Becquerel Finder

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Triathler Becquerel Finder is optimised for detection of radioactive isotopes in the event of a nuclear emergency

Triathler Becquerel Finder is a compact and easy to use screening instrument in case of a nuclear accident. Samples can be measured quickly and easily for the most common gamma emitters with ready made templates. The Becquerel Finder was widely in Japan after the accident in Fukushima Daiichi power plant.

The instrument is equipped with an external NaI(Tl) detector with enlarged lead shield which facilitates the use of Marinelli beakers with total sample volume of 1L. This enables rapid detection of I-131, Cs-134 and Cs-137 in foodstuff, water and milk.

Optionally, a standard Triathler Liquid scintillation counter can be equipped with the Triathler Becquerel finder detector. This combination provides a useful tool for detection of both alpha, beta and gamma emitters.

Beta emitter detection from water and swipe samples

Water and swipe samples can be measured easily. In emergency response Sr-90 is an important isotope. Triathler has been employed in several studies to measure Sr-90 from water, urine or nasal swab samples. When sample preparation chemistry is available, food and soil samples can also be measured.

Suitable for alpha emitter detection

Triathler LSC is also suitable for detecting alpha emitting isotopes. Triathler has been used in several publications and studies for especially Am-241 screening in an emergency setup. Triathler LSC and MLT are available with the optional alpha/beta separation that provides extremely sensitive instrument for alpha emitters. Applications vary from measurement from water to urine and even nasal swabs.


  • Simple operation, the user selects the nuclide by name and presses the “start” key, the instrument does the rest
  • 15 keV .. 1000 keV energy range, 1000 channel MCA
  • Stand alone or connected to a PC
  • 50 x 50 mm NaI detector planar type
  • Background shield 40 mm of lead
  • Single or dual label counting with spillover correction. Spill over correction can be made in PC
  • 32 character alphanumerical display
  • RS-232 connection
  • Preset nuclides: I-131, Cs-134 and Cs-137
  • Detection limit 20 Bq/L Cs-137, 5 minutes counting time
  • The Becquerel Finder can be connected with Triathler LSC for combined alpha and beta detection

Technical data:

  • Control unit: H 190 mm, D 330 mm, W 250 mm, weight 6 kg
  • Lead shield: H 400 mm, W 240 mm, weight 105 kg
  • Power input: 12V DC, 3 A or 100 .. 240V AC, 50/60Hz


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