Introduction to gas analyzers

Gas analyzers are devices designed to detect, measure and quantify the presence and concentration of specific gases in an air or gas sample. They are widely used in industries, laboratories and environmental environments to ensure air quality, control industrial processes and verify compliance with environmental regulations.

These instruments are essential for continuous or punctual monitoring of gases, allowing a rapid response to changes in gas composition that may affect the safety, health or efficiency of industrial systems. Its technological development has advanced considerably, incorporating sophisticated analytical techniques and highly sensitive sensors.

Spectroscopic methods

Gas analyzers based on spectroscopic methods use the interaction of electromagnetic radiation with gas molecules to determine their concentration. Among the most common techniques are infrared spectroscopy (IR), atomic absorption spectroscopy, and fluorescence spectroscopy.

Infrared spectroscopy is based on the selective absorption of IR light by gases, which have specific absorption bands corresponding to molecular vibrations. This allows gases such as carbon dioxide, carbon monoxide and other volatile organic compounds to be identified and quantified.

These methods offer high precision and sensitivity, as well as the ability to measure multiple gases simultaneously if advanced spectral systems are used, making them ideal for industrial and environmental applications.

Electrochemical detection

Electrochemical sensors detect gases through chemical reactions that generate an electrical current proportional to the concentration of the analyzed gas. This principle is common for toxic or flammable gases such as carbon monoxide, oxygen and sulfur dioxide.

These sensors are usually compact, low-power, and have fast response times, allowing their integration into portable and continuous monitoring systems. However, its useful life may be limited by the degradation of the electrodes and electrolytes.