Types of air quality sensors

Air quality sensors are an instrument for detecting ambient air quality. Its main working principle is to realize the detection and monitoring of ambient air quality by sensing the influence of gas components in the environment on the internal signal of the sensor.

Types of air quality sensors

Based on working principleTypes of air quality sensors

1.Laser scattering sensor

Laser scattering sensors use the scattering and reflection interactions between a laser beam and particles to detect the concentration of particulate matter in the air. It is characterized by wide measurement range, fast response speed, and high accuracy. It is suitable for indoor and outdoor air quality monitoring, industrial exhaust gas monitoring and other scenarios.

2.Electrochemical sensors

Electrochemical sensors use the reaction of a gas with an electrode surface to generate electrons to measure the concentration of gas components. It is characterized by high sensitivity and can detect a series of toxic gas concentrations. It is suitable for scenarios such as fire detectors and safety gas monitors.

3.Thermal conductivity sensor

The thermal conductivity sensor is a gas concentration measuring instrument based on the law of heat conduction, which uses the heat conduction of thermistor and heating wire to measure the gas concentration. It is characterized by high accuracy, fast response, and simple structure. It is mainly suitable for household air purifiers, car air purifiers and other scenarios.

4.Optical sensor

The optical sensor is a sensor based on the principle of light absorption, which uses the absorption effect of gas on light of a specific wavelength to measure the concentration of gas components. It is characterized by high sensitivity, fast response, and simultaneous determination of multiple gas components. It is suitable for indoor and outdoor air quality monitoring, industrial waste gas emission monitoring and other scenarios.

Based on application scenariosTypes of air quality sensors

1.Particle sensor: mainly used to detect particulate matter in the air, such as PM2.5, PM10, etc.

2.Gas sensor: mainly used to detect gases in the environment, such as ozone, carbon dioxide, carbon monoxide, etc.

3.Temperature sensor: mainly used to detect the temperature in the environment.

Application scenarios of Air quality sensors

As the problem of environmental pollution becomes increasingly serious, more and more scenarios need to use Air quality sensors to monitor air quality. Some typical scenarios are listed below:

1.Household Air Purifier

Home air purifiers typically use thermal conductivity sensors or electrochemical sensors to detect harmful gaseous components in the air.

2.Industrial waste gas emission monitoring

Industrial exhaust emission monitoring requires the use of laser scattering sensors, optical sensors, etc. to achieve accurate monitoring and detection.

3.Building indoor air quality monitoring

In public places such as offices and schools, it is necessary to use air quality sensors to monitor and adjust indoor air quality to ensure people’s health.

In short, Air quality sensors have played an important role in environmental protection, healthy diet and ecological construction. As people pay more and more attention to environmental pollution, their application prospects will become more and more broad.

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