SG700 Series of Stack Gas Analyzing Systems consist of an infrared gas analyzer, a zirconia oxygen analyzer and a sampling unit. The SG700 Series can simultaneously measure up to five components: sulfur dioxide (SO2), nitrogen oxides (NOx),carbon monoxide (CO), carbon dioxide (CO2) and oxygen(O2). Features 1. Simultaneously measure up to five gas components: 2. Minimize interaction between gases; 3. Reliable zirconia oxygen analyzer; 4. A wealth of functions, including self-diagnostic functions which enhance reliability; 5. Wide dynamic range.