Hydrocarbon gas analyzer

Details Hydrocarbon gas analyzer Hydrocarbon gas analyzer

1980-05-19

1982-04-06

Willis, Davis L.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250343, G01N 2126

Patent

active

043237770

ABSTRACT:
A beam of infrared radiation encompassing the absorption band of the hydrocarbon alkanes is passed through an unconfined sample of test gas after which the beam is chopped before it impinges upon an interference filter. The filter restricts radiation passing therethrough to the spectral interval corresponding to the absorption band of the hydrocarbon alkanes. The filtered radiation impinges on an infrared detector which produces a signal that on being amplified, detected and demodulated is an analog signal of magnitude functionally related to the product of concentration and carbon number of the n-alkanes (flammability index) of a mixture of hydrocarbons irrespective of their individual carbon numbers. The apparatus is unitarily arranged in an elongated rod-like housing adapted for convenient hand-held use.

REFERENCES:
patent: 4059356 (1977-11-01), Kebabian

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