This article was originally published on July 31, 2014.

E Instruments International

The BTU4400-NOx is a portable flue-gas analyzer designed for emissions monitoring and maintenance as well as tuning of combustion processes. Its rugged design and true-NOx capability make it ideal for furnace, engine and other combustion applications. This analyzer features a built-in printer, unbreakable metal hose connectors, temperature and pressure measurements, and internal data memory of 900 tests. You can choose up to four gas sensors: O2, CO, NO and NO2 or O2, CO, NO and SO2.