With the increase in industrialization and urbanization worldwide, the quality of the air we breathe has become significant concern. The World Health Organization (WHO) reports that 9 out of 10 people globally breathe polluted air, which the lives of around 7 million people every year. This has to the rise of various technologies aimed at monitoring and improving air quality, with Air Quality Sensors (AQS) taking the lead.

An air quality sensor is a device designed to measure and report the specific quantity and type of the pollutants in the air. These pollutants include particulate matter (like dust, smoke, and allergens), gaseous pollutants (like carbon monoxide, nitrogen dioxide, and ozone), and biological pollutants (like pollen, bacteria, and mold).

Principles of Air Quality Sensors

1. Sensing Principle

The core principle of air quality sensors is the sensing principle. Air quality sensors use different methods to detect pollutants in the air. This can include chemical reactions, light scattering techniques, or even changes in electrical resistance.

2. Calibration

Calibration is a crucial aspect of air quality sensors. It refers to the process of adjusting the sensor's output to match a known standard. Calibration ensures that the sensor readings are accurate and reliable.

3. Quality Control

Quality control is another integral principle in air quality sensors. It involves regular testing and maintenance of the sensors to ensure they continue to operate optimally and accurately.
https://www.renkeer.com/what-i....s-air-quality-sensor