Carbon monoxide detector

Details Carbon monoxide detector Carbon monoxide detector

1985-05-02

1989-02-07

Marcus, Michael S.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing gas sample

250345, 356410, 356437, 422 93, 436134, G01N 2105

Patent

active

048030520

ABSTRACT:
A carbon monoxide detector comprises a single monochromatic infrared source which is arranged to alternately direct light through two separate gas-containing test chambers. The first chamber is supplied with gas to be tested which has an unknown carbon monoxide content. A catalytic burning chamber is connected between the first and second chambers to receive gas from the first chamber, burn the carbon monoxide in the gas to carbon dioxide and supply the carbon monoxide free gas to the second chamber. A single infrared light detector is provided for receiving light as it comes alternately from the two chambers. The light from the two chambers is compared to determine the amount of carbon monoxide present in the gas of the first test chamber. Since the same background gas is provided in both chambers and only a single infrared source and detector are utilized, inaccuracies due to differences in background detection, infrared source intensity and infrared detector sensitivity are overcome.

REFERENCES:
patent: Re31438 (1983-11-01), Ueda
patent: 2019871 (1935-11-01), Pettingill et al.
patent: 2431899 (1947-12-01), Wolf et al.
patent: 4120592 (1978-10-01), Fleming et al.
patent: 4306153 (1981-12-01), Fabinski et al.
patent: 4371785 (1983-02-01), Pedersen
Karels et al., Continuous Method for Sampling Stack Gases for Total Carbon, Environ. Sci. and Techn. 1978, pp. 1046-1051.

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