Particulate matter sensors are used to detect the concentration of particulate matter in the air. Particulate matter refers to solid particles or liquid droplets with a diameter of less than 100 micrometers, including naturally occurring dust, smoke, and haze, as well as industrial dust and exhaust emissions generated by human activities. Particulate matter pollution causes serious harm to human health and the environment, so the monitoring and control of particulate matter concentration is of great significance.

The detection range of a particulate matter sensor refers to the particle size range that the sensor can measure. According to the working principle of the sensor, its detection range can be divided into the following categories:

● The detection range of optical sensors is usually 0.3 micrometers to 10 micrometers. Among them, the detection range of laser scattering sensors is the broadest, reaching 0.3 micrometers to 100 micrometers.

● The detection range of electrochemical sensors is usually 0.1 micrometers to 10 micrometers.

● The detection range of thermal sensors is usually 0.1 micrometers to 100 micrometers.

● The detection range of ion sensors is usually 0.1 micrometers to 10 micrometers.

The detection range of a particulate matter sensor is closely related to its application scenario. For example, for scenarios that need to monitor air quality, sensors capable of detecting PM2.5 and PM10 are usually required. For scenarios that need to monitor specific particles such as industrial dust, sensors capable of detecting specific particle size ranges can be selected.

In addition, the detection range is also affected by factors such as the sensor structure and manufacturing process. With technological progress, the detection range of particulate matter sensors continues to expand, meeting more complex application needs.