Non-dispersive infrared gas analyzer including gas-filled radiat

Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample

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25033912, 25033913, 25033906, 250343, 356436, 356437, 422 8209, G01N 2105

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active

054298059

ABSTRACT:
A non-dispersive infrared gas analyzer, with improved linearity in output concentration signal especially in measuring gas species of high concentration, includes a measuring cell into which a gas to be measured is fed, a non-selective infrared radiation sensor disposed on one side of the measuring cell, an optical band-pass filter disposed between the measuring cell and the infrared radiation sensor, and a nonselective infrared radiation source, disposed on the other side of the measuring cell and having an infrared radiation transmission window, wherein the radiation source further includes a gas filled therein at a predetermined partial pressure and the filled gas has at least a common partial molecular structure with the gas to be measured.

REFERENCES:
patent: 3851176 (1974-11-01), Jeunehomme et al.
patent: 3860344 (1975-01-01), Garfunkle
patent: 4176963 (1979-12-01), Fabinski et al.
patent: 4271124 (1981-06-01), Speeter
patent: 4794255 (1988-12-01), Miyatake et al.
patent: 5155545 (1992-10-01), Rinke

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