| 摘要 |
A method for continuous measurement of differences in gas concentrations, comprises providing at least first and second gas analyzers, connecting a stream of incurrent fluid to a chamber containing an animal, withdrawing air from the chamber to form a stream of excurrent fluid, taking first subsamples of the excurrent fluid in a first subsampler, taking a subsample of the incurrent fluid in a second subsampler, alternately providing excurrent fluid from the first subsampler to the first gas analyzer and to the second gas analyzer to measure the gas concentrations in the excurrent fluid, and alternately providing incurrent air from the second subsampler to the first gas analyzer and to the second gas analyzer to measure the gas concentrations in the incurrent fluid.
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