Removal of gases disturbing the measurements of a gas detector

Details Removal of gases disturbing the measurements of a gas detector Removal of gases disturbing the measurements of a gas detector

1990-07-06

1992-02-25

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250339, G01N 2135

Patent

active

050916491

ABSTRACT:
The invention relates to a gas detector for measuring one or more hydrocarbons or some other gas having its infrared absorption spectrum partially or entirely overlapping with water and, in addition, carbon dioxide and/or nitrogen oxide. The gas detector comprises a radiation source (1), a measuring chamber (3), a reference chamber (4), the electromagnetic radiation coming from the radiation source passing through said chambers, and a radiation detector (5). A beam passing from radiation source (1) both to measuring chamber (3) and to reference chamber (4) and from these chambers further to detector (5) travels in a space (14) which is provided with both a carbon-dioxide removing material (11) and a water-removing material (12). The invention relates also to a method for absorbing the carbon dioxide contained in said gas detector space (14) or in a part of this space into a carbon-dioxide removing material (11) and for absorbing the water into a water-removing material (12).

REFERENCES:
patent: 4567366 (1986-01-01), Shinohara
patent: 4577105 (1986-03-01), Krempl et al.
patent: 4793830 (1988-12-01), Murphy et al.
patent: 4803370 (1989-02-01), Eckles
patent: 4914719 (1990-04-01), Conlon et al.

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