Wearing A Face Mask To Prevent Haze?

Common market anti fog masks ranging in price from three or four Yuan to thirty or forty, materials including cotton, linen, activated carbon and other materials. Some masks known as PM2.5 filter effect up to 99%.

In fact, masks can be measured by experimental equipment for PM2.5 filter filtering effect. Principle is in the presence of wind turbines, gas inlet into the measuring Chamber, detector can detect measurement of PM2.5 in cavity.