Flue Gas Monitor's features: 1.Small sized, proper structured, light weighted,and easy to install; 2.Low cost, high accuracy; 3.Program and Easy operation; 4.Communication methods includes RS232 or 485, GPRS/CDMA/ADSL (optional); 5.Anti-static, anti-lightning, and anti-electromagnetic interference; 6.Dual channel -- 4-20 mA current output & 1-5 V voltage output; 7.Large-screened LCD, intelligent keyboard, and LED indicator can satisfy all the requirements for expansive control; 8.Powerful data storage function, large capacity of data storage; 9.Iintelligent diagnose function, manual calibration of zero and span;