🌬️ CO2Meter RAD 0301 Mini Monitor White: Accurate and Compact Air Quality Detector Review

I purchased this instrument and almost immediately I was unsure of its accuracy as it read 1200 PPM on the inside and over 800 PPM on the outside. I asked Revain for a replacement to confirm accuracy and in fact the difference between the two is usually over 600ppm. So, having two very different results, I naturally asked for a DIFFERENT substitution, expecting that it would match readings from at least one of the blocks, and I knew what was good and what was bad. But that's not the case…

The CO2 monitor is quite light, about the size of a pencil case/pen. Works with any USB micro-B cable connected to a regular phone or tablet charger. Very low power consumption - I've used it on battery power for many days to charge my mobile phone (so I can move the CO2 monitor around different rooms) and the battery level is still at 100%. Of course, as a simple consumer using this at home, I can't tell how accurate this is through empirical testing. But out here in the city it's about 450…

Basically I need a CO2 monitor to make sure the CO2 levels in my house are not getting too high. It seems to work. I tested it first by breathing on it for a few minutes and the reading went over 3000ppm (which is the max) then back to 750 when I stopped. After being in my bedroom where no one was it dropped to 550. After being there for a while it was about 750. I had the fresh air supply on and it dropped to 650. I was exercising in the room and this went up to 1200. I don't have a way to…