Table 1.

Low-cost PM sensor node applications, both indoor and outdoor, extracted from the scientific literature investigations and web searches.

Indoor	Outdoor
Concentration range up to thousands of μg/m3	Concentration range of 500 μg/m3
➢Air purifiers ➢Air cleaners ➢Air quality monitors ➢Air conditioners ➢Ventilation systems ➢Smoke fire alarms ➢Consumer electronic products ➢Environmental monitors ➢Household air purifiers ➢Automobile air purifiers ➢Residential and commercial air conditioning ➢HVAC systems ➢IoT hardware intelligence ➢Automotive applications ➢All kinds of IAQ monitors ➢Checking pollution “hotspots” ➢Personal exposure monitoring	➢Outdoor air quality monitoring ➢Emissions monitoring ➢Construction site monitoring ➢Mining site monitoring ➢Port and bulk handling terminals ➢Fence line monitoring ➢Brownfield developments ➢IoT hardware intelligence ➢Checking pollution “hotspots” ➢Personal exposure monitoring