Nitrogen dioxide is a regulated pollutant formed during high temperature combustion, and it is also an important gas in chemical production and air quality monitoring. Even at low concentrations it affects air quality and human health, so accurate measurement is central to emissions compliance and process control. Measuring NO2 is demanding because it is reactive and easily lost in a poorly designed sample line, which makes the sampling system as important as the analyser itself. The right NO2 analyser depends on your concentration range, your sample gas, and whether you need to measure total nitrogen oxides as well. TC Limited manufactures NO2 analysers for emissions monitoring and process control, and every analyser is supplied complete with a sampling system matched to your application.