PM 10 are particles with a diameter of 10 micrometers or less. They are around 10 times smaller than human hair. Examples of PM10 include dust from industrial and construction sites, wildfire smoke, and pollen.
PM 2.5 has a diameter of 2.5 micrometers or less ( human hair is approximately 100 micrometers in diameter). Examples of PM 2.5 are house dust, animal dander, cooking oil smoke/grease, smog, fly ash, and settling dust.
PM 1 has a diameter of 1 micrometer and smaller. PM 1 (from 0.3 to 1 micrometer) examples are suspended dust, house dust, animal dander, smog, tobacco smoke, and soot contaminants.

The display on the control panel for Airmega will show its real-time PM values depending on what size is toggled.

The color displayed on your device will be based on the pollution readings from the PM sensor.
The air quality indicator on the product panel makes it easy to check the current air quality around it.

• Blue:                    Good
• Green or Purple:  Moderate
• Yellow or Pink:     Unhealthy
• Red:                     Very Unhealthy