Review on Formaldehyde Portable Detector Recording Occasion by Carlos Reyes

This device is useless. I bought it because it has a good price and a lot of positive and negative reviews, so I decided to try it. Big mistake. I've read a lot of reviews mentioning that the PM2.5 and PM10 sensor doesn't work and they're right, they don't work. I took out the monitor and the numbers never changed, they always stayed at zero. The CO2 sensor works, but it doesn't even come close to the reality of the environment. I compared these readings to the temtop monitor I bought which is quite reliable as I compared the readings on temtop to my new Airthings Wave Plus which is a reputable brand which is not made in China but in Norway. The readings of both were almost identical. My advice: if you're really concerned about the air quality in your home, buy a quality monitor, don't buy anything under $100. If you are just looking for something like a toy then this is it.