Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. An Orsat gas
analyser is a piece of laboratory equipment used to analyse a gas sample
(typically fossil fuel flue gas) for its oxygen, carbon monoxide and
carbon dioxide content. Although largely replaced by instrumental
techniques, the Orsat remains a reliable method of measurement and is
relatively simple to use. The apparatus consists essentially of a
calibrated water-jacketed gas burette connected by glass capillary
tubing to two or three absorption pipettes containing chemical solutions
that absorb the gasses it is required to measure. For safety and
portability, the apparatus is usually encased in a wooden box. The base
of the gas burette is connected to a levelling bottle to enable readings
to be taken at constant pressure and to transfer the gas to and from the
absorption media.
