AlphaGUARD-Radon Monitor – Bertin Instruments

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AlphaGUARD is a portable, battery or net-operated radon monitor with high storage capacity. In addition to the radon concentration in air, AlphaGUARD measures and records also simultaneously ambient temperature, relative humidity and atmospheric pressure with integrated sensors.

Thanks to its high sensitivity and long time stable calibration, it is the reference instrument for professional radon monitoring and accurate measurement on site.

The complete product line provides all accessories for radon in air, water, soil, building materials, progeny, thoron and calibration equipment to perform air, water, soil, exhalation measurements. The collected data can be linked to the DataVIEW software, allowing data download and storage as well as professional data analysis and reporting. With AlphaGUARD, bring your Radon Lab everywhere.


  • 0.62 L pulsed ionization chamber
  • Measuring range of 2 to 2,000,000 Bq/m³,
  • Instrument calibrator error of 3%
  • Storage capacity of up to 60,000 measurement points
  • Storage of:
    • 400 days at 10 min measuring cycle
    • 2,500 days at 60 min measuring cycle
  • Battery life of 10 days (40 days with external battery)
  • 329 mm x 355 mm x 123 mm and weighs 6,2 kg (13,7 lbs)


AlphaGUARD is suitable as a reference device and offers the following features:

  • Quality at the highest level
  • Long-term stable calibration factor (guaranteed 5 years)
  • Calibration traceable to different national standards (PTB, NIST, NPL)
  • Inbuilt quality assurance system for permanent validation of system operation and data
  • Fast transient response
  • Automatic background correction
  • No sensitivity to high air humidity


AlphaGUARD incorporates a pulse-counting ionization chamber (alpha spectroscopy).

Based on optimal chamber geometry and intelligent signal evaluation, this radon monitor is suitable for continuous monitoring of radon concentrations between 2 – 2 000 000 Bq/m³.

The DSP (Digital Signal Processing) technology provides highly effective differentiation ability between “real” radon data and all kinds of artefacts.

Your Radon Lab everywhere

  • AquaKIT
  • Soil gas Probe
  • AlphaPM
  • AlphaPUMP / LabPUMP
  • Emanation / Calibration Container
  • Exhalation Box
  • On line Radon in water monitoring
  • Valve Selector
  • DataVIEW PRO software


  • Reference instrument with high sensitivity
  • Calibration stability guaranteed for 5 years
  • High performance for versatile applications
  • Maintenance-free operation

For more information about the Alphaguard, take a look at our partner’s website, or read this PEO article!


Bertin Instruments is een onderdeel van de CNIM-Groep met meer dan 60 jaar ervaring op het gebied van instrumentatie. Het bedrijf richt zich op innovatieve oplossingen op het gebied van meten en sampl...


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Datasheet - AlphaGUARD

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