During the occurrence of fire, the concentrations of PM10, PM2.5, PM1, and VOCs in the air increase to varying degrees. The increase in PM10 is usually more significant than PM2.5, as it can originate from natural sources like soil particles. In contrast, PM2.5 primarily comes from human activities, such as vehicle exhaust and industrial emissions. Incomplete combustion during fire releases VOCs, which are usually colorless but can be detected by smell or specialized instruments. While research on PM1 is less extensive, it is known to be a component of PM2.5.

Monitoring the concentration changes of these particles in the air is crucial for assessing the impact of fire and managing air quality. The rise rates of different particle types (PM1, PM2.5, PM10) and VOCs during a fire vary due to factors such as the type of burning material, the completeness of combustion, and meteorological conditions. Understanding the variation of these particles under specific conditions is essential for predicting the impact of fire and developing corresponding air quality management strategies.

CurieJet® P760 Particle & Gas Sensor, with size only 29x 29x 7.2 mm, is the world’s smallest all-in-one air sensor with only 1/16 volume compared with others. P760 uses laser light with Mie scattering theory to measure PM2.5, PM10 and even PM1.0. P760 also can detect VOC gas, show the ventilation status, sense barometric pressure for weather glass or altitude difference. It also detects ethanol and may be developed as alcohol breath tester, or drunk driving prevention alarm system. https://www.curiejet.com/en/product/particle-voc-index-barometric-pressure-sensor/environmental-sensor-modules