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Why are the PM readings different from my other Blueair air purifiers or air quality monitors?

Small deviations between the sensors’ readings are normal because PM sensors in Blueair air purifiers use different measurement technology - depending on the Purifier model. Large differences between sensor readings may happen if the sensors are clogged with dust. Try to vacuum the sensor from the outside. The PM values should decrease shortly after the vacuuming. If the issue remains, please contact your Blueair Customer Support.

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