The role of electrochemical NO2 sensor in environmental monitoring

User:JXCTUpload time:Dec 08 2021

Toxic gas detector unit-Gas Detector-NO2 gas is a brownish-red gaseous pollutant, also known as nitrogen oxide. Nitrogen dioxide gas is one of the common air pollutants. This is difficult in many waste gas treatments. It is also one of the culprits of air pollution. If there is no timely and effective treatment and purification. It will not only affect the health of operators, but also cause great harm to the interior and surrounding environment of the factory. Therefore, electrochemical NO2 sensors play a very important role in environmental monitoring and our daily lives.

According to the purification principle, the treatment methods of nitrogen dioxide waste gas can be divided into three categories: catalytic reduction method, absorption method and adsorption method. Catalytic reduction method.

The main principle is to reduce NOx in exhaust gas to N2 at high temperature in the presence of a catalyst. Due to the high reaction temperature, catalysts are needed, equipment investment is large, and operating costs are high.

multi gas sensor module
Adsorption method

Adsorbents and adsorbents are mainly used to adsorb NOx in exhaust gas. Due to the small adsorption capacity. This method is only suitable for waste gas treatment with low NOx concentration and small gas volume.

Absorption method

Toxic gas detector unit-Use water or an aqueous solution of acid, alkali or salt to absorb nitrogen and oxygen compounds in the exhaust gas to purify the exhaust gas. This method requires less equipment investment and lower operating costs.

Gas detector-the above three nitrogen dioxide exhaust gas treatment methods have been used for many years. Now, with the improvement of environmental protection standards. In order to achieve good results, it is indeed necessary to combine several types of equipment for purification.

There are many gas components in industrial waste gas. When monitoring various gases in complex gases, you can choose to use detection instruments that can simultaneously monitor various gases, or install corresponding gas sensors, such as electrochemical NO2 sensors.

Electrochemical NO2 sensor can be used for gas concentration detection and concentration exceeding alarm. The real-time concentration value and standard signal output can be displayed on site. It has the characteristics of stable signal, high sensitivity and high precision, and is suitable for various harsh working environments.