Radon monitor and control system based upon alpha particle detec

Details Radon monitor and control system based upon alpha particle detec Radon monitor and control system based upon alpha particle detec

1989-06-09

1991-06-25

HAannaher, Constantine

Radiant energy

Geological testing or irradiation

With sampling

250253, 25037002, G01T 100

Patent

active

050269860

ABSTRACT:
A system for monitoring or controlling the level of radon in indoor air, based upon measuring alpha particles due to the decay of radon or its daughter atoms. In one embodiment, the alpha particle decay of radon itself is detected and analyzed to control a vent in the heating and air conditioning system to automatically keep the radon level below a preselected level. In another embodiment, the daughter atoms .sup.218 Po and .sup.214 Po are collected from the indoor air and their alpha particle decays are analyzed to provide a sensitive monitor of radon levels or to control vents in the HVAC system to reduce radon concentrations to permissible levels. In addition, the system provides information on the quality of the air filter and indicates when it needs servicing.

REFERENCES:
patent: 3922555 (1975-11-01), Chapuis et al.
patent: 4871914 (1989-10-01), Simon et al.

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