Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1982-11-05
1985-05-21
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250343, G01J 100
Patent
active
045188610
ABSTRACT:
For a continuous measurement of the mass of absorbing particles in a gaseous sample, the sample is traversed by electromagnetic radiation of a wavelength greater than the mean radius of the particles. The difference in absorption for at least two frequencies is determined and appointed to the particle mass sought after.
REFERENCES:
patent: 3281597 (1966-10-01), Greenberg
patent: 4229653 (1980-10-01), Uthe
Faschingleitner Leopold
Krempl Peter W.
Schindler Wolfgang
Howell Janice A.
List Hans
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