Flue Gas Measurement

An exhaust measurement commonly refers basically to the gases carbon monoxide (CO) and oxygen (O₂).
However also other gases – like carbon dioxide (CO₂), nitric oxides (NO + NO₂),  sulphur dioxide (SO₂), methane (CH₄), propane (C_3<H₈), total hydrocarbons (C_xH_y),  hydrogen (H₂), hydrogen sulphide (H₂S), ammonia (NH₃) and hydrogen chloride (HCl) can also be analysed.
The measurement ranges resp. the accuracies depend on the properties of the respective gas, on the specifications of the analyser as well as on the sensors utilized.
An exhaust measurement consists in prelevating sample gas from an exhaust stream. The warm gas is conveyed thru a temperature-resistent sampling probe, a sampling tubing and a gas processing system into the flue gas analyser.