Can infrared dust sensors be applied in PM2.5 detectors? Generally speaking, infrared dust sensors can be installed in PM2.5 detectors. However, for portable PM2.5 detectors that require rapid response while the testing field is constantly changing, laser dust sensors are typically used. Infrared dust sensors can be used in fixed PM2.5 detectors or those that do not need frequent moving.

Whether it is an infrared dust sensor or a laser dust sensor, both can accurately measure particle concentration values in the air as long as there are no special environmental requirements. The difference is that laser dust sensors come with fans to generate a stable airflow, allowing them to quickly obtain PM2.5 concentration values once started. Infrared dust sensors contain only a heating resistor without a fan; airflow is generated by the temperature difference between the inside and outside of the sensor after the resistor heats up, allowing the sensor to detect PM2.5 concentrations in the resulting flow. It is precisely for this reason that infrared dust sensors are not very suitable for portable detectors.

While infrared dust sensors lack the stable airflow provided by a fan compared to laser sensors, they possess an irreplaceable advantage: low cost, making them suitable for a wider range of products.