Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1996-02-23
1998-06-30
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250343, G01N 2135
Patent
active
057738289
ABSTRACT:
A gas analyzer has a simple composition and can measure multi-components at a high accuracy. A plurality of measuring cells, including a case where the cells are different in length from each other, communicate sequentially with each other through a communication part to form a single gas path. A cut-on filter as an infrared penetration/reflection means for diffracting spectrally an infrared wavelength is provided on a light source side. A NO.sub.X measuring cell 3 having a cell length of about 60 mm and a CO.sub.2 measuring cell 7 having a cell length of about 1 mm which communicate through the communication part with each other, and a capacitor microphone (an infrared-ray detector for NO.sub.X) and a pyroelectric detector (an infrared-ray detector for CO.sub.2) are provided on the infrared penetration and reflection sides of the optical filter.
REFERENCES:
patent: 4684805 (1987-08-01), Lee et al.
patent: 4914719 (1990-04-01), Conlon et al.
patent: 5331409 (1994-07-01), Thurtell et al.
J. Staab. "Industrielle Gasanalyse". Technisches messen 60 (1993) 10; pp. 398-401.
Akiyama Shigeyuki
Fujiwara Masahiko
Ohnishi Toshikazu
Oida Takuji
Shimizu Naohito
Hannaher Constantine
Horiba Ltd.
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