Review on Accurate VIVOSUN Pollution Detector: Formaldehyde & Humidity Measured with Precision by Bud Crabtree

This portable pressure gauge is very handy and the battery life is good. Previously, this was helpful in isolating some of the VOC sources in our home that were causing bad smells. Now for the bad news: PM numbers are consistently lower than they actually are. We have several high quality PM2.5 and PM10 meters in our area that monitor outdoor air quality and when this sensor is placed outdoors it will show 1/2 to 1/3 of the 'true' PM2.5 and PM10 values. show the better meters.