Patent classifications
G
PHYSICS
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G01
MEASURING; TESTING
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G01N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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33/00
Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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G01N33/0004
Gaseous mixtures, e.g. polluted air
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G01N33/0009
General constructional details of gas analysers, e.g. portable test equipment
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G01N33/0027
concerning the detector
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G01N33/0036
specially adapted to detect a particular component
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