... wide measuring range ,high accuracy Model ZRE Flue Gas Analyzer is imported originally from Fuji Electric Corporation of Japan ... SO2,NOx(such as CO, CO2, CH4 of the smoke.The analyzer has range settings, range conversion, fault ... use zirconium oxide to measure oxygen directly. The analyzer with wide measuring range ,high accuracy, fast response ... S( per week)60soutputRS232/RS4854-20mA flue gas analyzer