The normal use of the humidifier will indeed increase the value of some PM2.5 detectors, but it is caused by water vapor, which is completely different from the smog air pollution mentioned in ordinary times. The humidifier sprays water after atomization to increase indoor air humidity. The humidifier sprays water vapor.
At present, the PM2.5 detection equipment available on the market uses the relatively simple and easy "laser scattering method" to detect particles, which is characterized by the inability to distinguish between particles and water vapor. In addition, the usual diameter of water vapor is between 0.5 μ m and 10 μ m, that is, the level of PM0.5 to PM10, so it is easy to be included in the value of the PM2.5 detector.