Gas Analysers

Gas analyzers are sophisticated devices used for determining the quantitative composition of gas mixtures in air monitoring. They play a crucial role in a variety of fields, including environmental monitoring, industrial processes, and safety. At the core of their function, gas analyzers measure the concentrations of various gases within an ambient environment. This is pivotal for monitoring air quality, particularly in urban areas or near industrial sites, where pollutants like nitrogen oxides (NOx), sulfur dioxide (SO2), carbon monoxide (CO), carbon dioxide (CO2), and volatile organic compounds (VOCs) can pose significant health and environmental risks.

There are several types of gas analyzers, each employing different methods for detection and analysis. Infrared gas analysers detect gas by measuring the absorption of infrared light by gas molecules. They are particularly effective for gases like CO2 and hydrocarbons, which absorb infrared light. Electrochemical gas analysers are used to detect gases like oxygen, carbon monoxide, and hydrogen sulfide. They work by producing a chemical reaction at an electrode surface and measuring the resultant electric current. Photoionization detectors (PIDs) are used for measuring volatile organic compounds (VOCs). They ionize the gas molecules using ultraviolet light and then measure the ions produced. Chemiluminescence analysers are commonly used for measuring nitrogen oxides, these analyzers detect gas concentration based on the light emitted from a chemical reaction. Flame ionization detectors (FIDs) are typically used for detecting hydrocarbons, FIDs measure the ions produced by a gas when it is burned in a flame.

Gas analyzers are essential in environmental monitoring to track air pollution levels and assess compliance with environmental regulations. They help in identifying and quantifying pollutants, enabling authorities to take corrective measures and policy actions to improve air quality. In industrial settings, gas analyzers are used to monitor and control industrial processes, ensuring safety and efficiency. For example, in the petrochemical industry, they are used to detect gas leaks, which could be hazardous to both workers and the environment. Additionally, gas analyzers play a vital role in occupational health and safety. They are used to ensure that workplaces comply with health and safety standards, particularly in environments where workers might be exposed to toxic gases. Overall, gas analyzers are indispensable tools in our ongoing efforts to understand and manage the quality of the air we breathe, ensuring environmental protection, industrial safety, and public health.


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IET 34.2 March 2024

March 2024

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