Instant results whenever and wherever with the portable Hidex Triathler liquid scintillation counter and luminometer

The Hidex Triathler is a single sample liquid scintillation counter that provides fast and accurate results for several life science and environmental applications. It can count all radioisotopes including tritium in a variety of sample formats. Due to its very small size and light weight, the Triathler can be taken in the field to measure samples on the spot.

Although small, the Triathler has many advanced features such as advanced spectrum analysis using a multi-channel analyzer (MCA), Instant DPM results, single-photon luminescence counting, and optional PC control and data transfer.

Applications for Monitoring

Wipe Tests
The Triathler provides fast and reliable results for regulatory wipe tests in lab areas.

Water Measurements
The Triathler has alpha-beta separation capabilities which makes it ideal to detect alpha-isotopes like Radon (222Rn) in water. It is also sensitive enough to perform monitoring of 3H in discharge water used at power plant sites.

Soil Measurements
With proper extraction techniques, the Triathler can be used to measure soil samples for contamination with any radioisotope.

Learn More 

To learn more about liquid scintillation counting applications and techniques please visit Hidex’s Liquid Scintillation – Measuring Procedures, New Developments eBook.

Applications for Life Sciences

Molecular Biology
The Triathler is well suited for metabolic studies, genetic studies, cell proliferation assays, receptor-ligand assays, and other applications in biosciences. For example, using the optional plastic scintillator adapter (PSA), 32P can be measured non-destructively (without cocktail).

Marine Biology
The Triathler is commonly used to measure growth of phytoplankton in seawater and lakes by measuring uptake of 14C.

The Triathler is ideal as an easy-to-use diagnostic tool in research for detection of beta and gamma isotopes, such as 14C and 125I.

The Triathler can be used as a high sensitivity luminometer for both glow and flash type assays, such as ATP monitoring, luciferase and bacterial measurements. An optional reagent injector is available for more demanding applications, such as kinetic measurements.

Learn More 

To learn more about liquid scintillation counting applications and techniques please visit Hidex’s Liquid Scintillation – Measuring Procedures, New Developments eBook.


The Triathler has advanced features such as a built-in multichannel analyzer, optional alpha-beta separation electronics, and connectivity to a PC for instrument control and data analysis.

Easy to Use

A keypad allows single key operation for immediate results using preset protocols for any isotope.


The Triathler’s small size and light weight make it ideal for personal use on a benchtop or for on-site field/sea measurements.


The Triathler is suitable for just about any beta radiation, gamma radiation or luminescence application and accepts most types of vials and sample formats.

Becquerel Finder

The Triathler Becquerel Finder is optimized for detection of radioactive isotopes in the event of a nuclear emergency in food. The instrument is equipped with an external NaI detector with an enlarged lead shield, which facilitates the use of Marinelli beakers with total sample volume of up to 1L. This enables rapid detection of I-131, Cs-134 and Cs-137 in foodstuff, water and milk.


  • Simple operation, the user selects the nuclide by name and presses the ‘start’ key, the instrument does the rest and provides total count rate.
  • The Bequerel Finder can be connected to Triathler LSC for combined alpha and beta detection.
  • Preset Nuclides: I-131, Cs-134 and Cs-137.
  • Detection Limit: 20Bq/L Cs-137 (5 minutes counting time).
  • 15 keV - 1000 keV energy range, 1023 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.
  • RS-232 connection or with USB adapter.
  • Power input: 12V DC, 3 A or 100/240 V AC, 50/60Hz
  • Dimensions and Weight:
    • Control Unit: H 19 cm x L 33 cm x W 25 cm, Weight 6 kg
    • Lead Shield: H 40 cm x D 24 cm, Weight 105 kg

NaI Well Counter

The Hidex Triathler with an external NaI detector can be used in research PET scanning facilities to count blood samples as part of imaging protocols in order to derive quantitative parametric images.

The system is suited to counting samples emitting 511keV photons (thick scintillation crystal with adequate shielding from external 511keV photons) which can be linked up to a PC and printer for data transfer and hardcopy.

This turnkey NaI system comprises a multichannel analyzer with an external NaI detector (model 431-040) and an optional lead shield (model 431-041).


  • Simple operation, the user selects the nuclide by name and presses the "start" key, the instrument does the rest
  • 15 keV .. 2000 keV energy range, 1000 channel MCA
  • Stand alone or PC configuration, no external PC is needed (but can be connected)
  • 50 x 50 mm NaI detector, end well, well diam. 25 mm, well depth 33 mm
  • Background shield 30 mm of lead
  • Single or dual label counting with spill-over correction
  • 32 character alphanumerical display
  • An RS-232 port to drive a PC or a printer
  • Preset nuclides:125I, 129I, 57Co, 51Cr, 137Cs, 58Co
  • Software for MS Windows to download the results to a file or MS Excel worksheet is included
  • Power input: 12V DC, 1.5 A or 100 .. 240 V AC, 50/60Hz
  • Mechanical data, control unit: H 190 mm, D 330 mm, W 250 mm, weight 6 kg
  • Mechanical data, lead shield: H 350 mm, D 200 mm

How many samples can it hold?

It only holds one sample at a time which can be loaded manually. For a small batches it is feasible. It even has a buzzer to alert you after a vial is read.

How portable is the Triathler?

The Triathler is only truly portable LSC. It can operate off a standard outlet, 12V car adapter, or battery pack. You can even get a customized field case with wheels and a pullout handle similar to luggage.

Is there a software package?

Yes the Triathler has a Window 7/8 compatible software package that allows for advanced calculations, spectrum analysis, Excel export and report generation.

Is the Triathler suitable for P32?

Yes P32 can be measured directly by Cerenkov counting. It even has an adapter for 1.5mL microcentrifuge tubes.

Can I change the preset isotopes?

Yes the preset isotopes can be changed to any other including the name and channel settings.

Can the Triathler identify isotopes?

No the Triathler can generate a spectrum but it cannot identify based on spectrum. Some spectrums overlap and quenching can change the spectrum shapes, therefore other methods must be utilized.

Would I be able to use the Triathler as a well-type counter?

Yes the Triathler has the option of an external NaI well-type detector. It comes in two configurations – one of vials and one for Marinelli beakers.

How many technologies can one Triathler unit utilizes?

Up to four – liquid scintillation counting, alpha/beta separation, gamma counting and luminescence counting.

What is the background reading?

The background can vary based on isotope, channel settings, location/surrounding influences, and chemiluminescence. It has an internal lead shield upgrade to further reduce background.

Can I use a quench curve?

Yes once generated the Triathler can store a quench curve internally.

Existing Hidex Triathler customers 

Click the tabs below to learn more about our customers and their applications.

Yvelines Departmental Fire and Rescue Service, France

Safeguarding the Paris Olympics

The Yvelines Departmental Fire and Rescue Service (commonly abbreviated to SDIS 78 in French) has procured a Hidex Triathler for the Olympic Games in Paris to complement their existing range of detectors for radiological threats. As part of the service’s Mobile Radiological Response Unit, Captain Jean-Nicolas Cluzeau is SDIS 78’s technical advisor for radiological threats. He first became aware of the Triathler during his training at ENSOSP, France’s national school for fire officers, when writing a technical report dedicated to the detection of low-energy alphas and betas, as well as alphas in aqueous environments.

You can find out what Captain Cluzeau had to say by clicking the button below.


University of Edinburgh, UK

Compact, lightweight and easy to set up, Triathler is perfect for RPA’s tasked with undertaking wipe tests on the go. It provides fast and accurate results, counting all radioisotopes including Tritium, indeed it is suitable for just about any beta and gamma radiation application and accepts most types of vials and sample formats.


Cardiff University, UK

Emma Dalton, Laboratory Manager at the Neuroscience & Mental Health Research Institute at Cardiff University, discusses how the Hidex Triathler liquid scintillation counter and luminometer has benefited the facility.


Bristol University, UK

Dr Liam Payne, a researcher at the university, comments on the sale of the Hidex Triathler here.

Veteran Affair Medical Centers (VAMC), USA

VAMCs across the USA have chosen the full Hidex range for their research instruments of choice in their laboratories. 



Application Notes

The LabLogic Group will always treat your details with the utmost care and will never sell them to third party companies.

Please choose one of the following:

  • Hidex Triathler 
  • Triathler Well Counter 
  • Hidex Triathler Becquerel