The flue gas analyzer works in two ways: electrochemical and infrared. Portable smoke analyzers in the market are usually combined, as described below:
EGC sensors: The gas to be detected is removed through dust, damp into the sensor room, enters the electrolytic cell through the permeable membrane, so that the gas that is diffused in the electrolytic fluid is electrolyzed at the specified oxidation level, and concentrations of the gas are derived from the consumed electrolytic current.
Installation of working electrodes, electrodes and reference electrolytics between electrolytes, diaphragms made of pore-tetrafluoroethylene and encapsulation at the top, in a plastic-made drum pool. The pre-memplifier is connected to the sensor ' s electrode, which exerts a certain level of electrical power between the electrodes, leaving the sensor in a working state. The working electrodes of gases in electrolytes are oxidized or reducted, and the electrodes are reductive or oxidized, and their equilibrium level changes, with a variation value proportional to the concentration of gases. Gases such as SO2, NO, NO2, CO, H2S can be measured, but the sensitivity of these gas sensors varies from H2S, NO, NO2, SO2, CO, usually from seconds to tens of seconds, to less than 1 min; They have a life span of only half a year, two or three years, and some CO sensors last for several years.
Flue Gas Analyzers Infrared sensor working principles: Gas composition and content analysis using different gases for special absorption properties of electromagnetic energy at infrared wavelengths.
Infrared is generally associated with electromagnetic radiation at wavelengths ranging from 0.76 m to 1,000 m. Infrared wavelengths actually used in infrared gas analysis instruments are approximately 1 ~50 m.