Method and apparatus for measuring unattached radon progeny

Details Method and apparatus for measuring unattached radon progeny Method and apparatus for measuring unattached radon progeny

1998-02-06

2000-02-01

Brock, Michael

Measuring and testing

Gas analysis

Solid content of gas

73 3102, 250282, 250DIG2, 324693, G01N 2704

Patent

active

060189851

ABSTRACT:
A method and apparatus for measuring the concentration of unattached Radon progeny in air is described. The method consists of measuring the conductivity of the air or alternatively the concentration of fast ions in the air, and converting the measurement to a concentration of unattached Radon progeny by applying a predetermined ratio found to exist between conductivity and the concentration of unattached Radon progeny on the one hand, or between the concentrations of fast ions and unattached Radon progeny on the other hand. Apparatus for implementing the method includes means for measuring conductivity (or fast ion concentration), means for calculating the concentration of unattached Radon progeny using the predetermined ratios and output means for displaying the result of the calculation.

REFERENCES:
patent: 4451736 (1984-05-01), Cameron
patent: 4847503 (1989-07-01), Tetley et al.
patent: 4868386 (1989-09-01), Ilmasti
patent: 4977318 (1990-12-01), Ilmasti et al.
patent: 5514872 (1996-05-01), Bolton et al.
patent: 5834628 (1998-11-01), Hunter et al.

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