Radiant energy – Invisible radiant energy responsive electric signalling – With radiant energy source
Patent
1998-01-21
1999-11-02
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With radiant energy source
250432R, 250435, G01T 704
Patent
active
059775475
ABSTRACT:
An apparatus for testing air having contaminants and radon progeny therein. The apparatus includes a sampling box having an inlet for receiving the air and an outlet for discharging the air. The sampling box includes a filter made of a plate of sintered stainless steel. The filter traps the contaminants, yet allows at least a portion of the radon progeny to pass therethrough.
A method of testing air having contaminants and radon progeny therein. The method includes providing a testing apparatus that has a sampling box with an inlet for receiving the air and an outlet for discharging the air, and has a sintered stainless steel filter disposed within said sampling box; drawing air from a source into the sampling box using a vacuum pump; passing the air through the filter; monitoring the contaminants trapped by the filter; and providing an alarm when a selected level of contaminants is reached. The filter traps the contaminants, yet allows at least a portion of the radon progeny to pass therethrough.
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Edwards Howard D.
Phillips Terrance D.
Gagliardi Albert
Hannaher Constantine
Westington Savannah River Company
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