The difference between infrared and electrochemical fume analyzers?

　　Zhejiang Highpower Environmental Technology Ltd.

　　The flue gas analyzer in the market is mixed, so it also produces various types of smoke analyzers.

　　The main principle of the electrochemical flue gas analyzer is to measure currents at the electrodes by oxidizing or reducing the gas measured in the object, resulting in a detector of the concentration of the gas in the object. Sensors have two to three electrodes in contact with electrolytic fluids and occasionally four electrodes. The electrodes are usually composed of fixed, high surface precious metal multi-pore porosity metallic membranes. Working electrodes are exposed to electrolyte and ambient air monitoring usually through a multi-pore membrane. The electrolyte is most commonly a-inorganic acid, but organic electrolyte is also used for some sensors. The gas spreads to sensors, oxidizing or reducing the multi-pore membranes of the working electrodes. This electrochemical reaction results in currents passing through external circuits.

　　The advantages of electrochemistry: small effort, high sensitivity, good linearity, high accuracy, low quality and small size. The disadvantages are also evident, short life, anti-disruption detection, slow response times, and high temperature.

　　Infrared flue analyzer, also known as the non-colour-dispersible infrared fume analyzer, is a simple spectroscopy sensor, usually used as a gas detector.

　　The NDIR sensor, the main component of the ISM, is an infrared source (light), a sample room or PV, a filter and an infrared detector. The causes of the gases in the sample room are based on specific wavelengths, the decay of which is measured by the probe to determine the concentration of the gases. The detector has a wavelength that can be absorbed by all light except the selected gas molecule. Infrared flue gas analyzers will have a long life compared to electrochemical sensors, have a fast response time, are highly toxic, are responsive and reliable. The disadvantage, however, is that it is costly and expensive in terms of structure.

　　Both types of sensors have advantages and the gases measured are slightly different. The gases tested by the electrochemical flue gas analyzer are mainly organic compounds and primarily test gas concentrations. Infrared flue gas analyzers are primarily measuring a number of large-range gases, such as carbon monoxide, carbon dioxide, methane and sulphur hexafluoride, which are chemically stable.