... and dust exhausted from industrial boiler, industrial furnace, power plant boiler flue. 4. Provides parameters of flue ... . Data acquisition and processing equipment 7. Calibration equipment8. Measuring device including Flue gas temperature, humidity, velocity, oxygen contentMain ... calibration zero and calibration of SO2, NOx, O2 measuring device.4.3 Timing automatic calibration4.4 Function of ...