Power, steel, cement, aluminum smelters, non-ferrous metal smelters, phosphate fertilizer, nitric acid, sulfuric acid, petrochemical, chemical fiber plant of large industrial coal-fired chimney and other fixed sources of exhaust gas concentration monitoring.Features :1. the system continuously monitors the gaseous pollutants by heating extraction method.2. sampling probe has large filtering area, the filter easy to replace.3. pretreatment system using imported devices which effectively waterproof, dust-proof, anti-corrosion.4. plc data acquisition system is fully functional, intuitive and easy to operate.5. a variety of data output.6. the analyzers can be flexibly selected according to field requirements.7. analysis system cabinet modular design and easy to operate.8. the analysis system has stability and high reliability, it can reduce the daily maintenance costs.9. this model have rich features, it can achieve automatic sampling, purging, calibration, fault diagnosis, alarm, etc.