The instruments and analyzers produced by Zetian now are widely used at home and abroad. They are: UV DOAS gas analyzer, laser TDLAS gas analyzer, gas analysis module, forward/backward laser dust monitoring devices, hygroscope for high temperature, continuous emission monitoring system (CEMS), denitration escape ammonia analyzer, sulphur analyzer, trace Cl analyzer system, immersive UV broad spectrum water analyzer, ammonia nitrogen analyzer, colorimetric heavy analyzer, anodic stripping voltammetry heavy metal analyzer etc.
http://www.zetian-group.com/products/continuous-emission-monitoring-process-control/