Under Construction

Under Construction





Professional Radon monitor

AlphaGUARD is a portable equipment designed for instantaneous or continuous measurement of radon gas activity (Rn-222).
AlphaGUARD is used for the measurement of Radon in the environment, mines, laboratories and also for complementary investigations in buildings.
Air, water, soil, exhalation measurements are performed thanks to a large range of accessories and external probes.
DataEXPERT software performs data analysis and storage.
The type PQ2000 PRO is now upgradeable with a Thoron measurement mode. This addidional new mode enables the AlphaGUARD to discriminate radon from thoron.


Detector 0.62 L ionization chamber
Mode of operation 3D alpha spectroscopy and current mode
Measuring range 2 – 30 000 Bq/m³ (P30)
2 – 2 000 000 Bq/m³ (P2000/PQ2000/PQ2000PRO)
Instrument calibrator error 3%
Sensitivity of detector 1 cpm at 20 Bq/m³
Detector filling system Design optimized for fast passive diffusion :10/60 min and
flow mode : 1/10 min (PQ2000 PRO only)
Memorization P30/P2000/PQ2000 : 1 to 4 months (resp. 10 min and 60 min cycles)
PQ2000 PRO : 3 days, 1 and 6 months (resp. 1, 10 and 60 min cycles)
Autonomy 10 days (40 days with external battery)
Dimensions 120 x 315 x 175 mm3
Weight 4.5 kg