Temtop CO2 Monitor Indoor air Quality Monitor Portable CO2 Meter, CO2, Temperature, Humidity Home, Office or School

I bought a second for our summer home after great success with the first in our winter home, and have recommended it for my daughter in law, who will be buying one.Our master bedroom was over 1500 ppm CO2 with closed windows and vents. My husband likes it stuffy and sealed and warm, and I was wondering if that had anything to do with his indoor torpor compared to his hiking enthusiasm.Cracking the bedroom casement window with a slight breeze took the room CO2 rapidly down to the ambient 375 ppm at our mile high altitude. Refreshing.My reasonably large office in the summer home goes up to over 1025 ppm with windows closed. No gas heat or pilot lights here. It can only be due to human respiration and no ventilation.Open windows, now down to 636 ppm, with ambient outdoor 425 ppm at sea level here.It also gives the temperature and humidity! It has a nice little magnetic stand.

Most monitors have a backlight that can't be turned off. If you prefer to sleep in a darkened room, this is a good choice, with its basic unlighted LCD display. Also, without the backlight, the specs say its internal battery will keep it running for a month or two rather than the day or two which is typical for lighted units; this only matters if you need it to run for an extended period without being plugged in. It seems reasonably accurate; probably not a precision unit, but good enough to get a sense of your living environment.

Seems to be an accurate meter. Battery last long and very versatile

It works and is very helpful! However, the software sucks.

Good quality, pretty much ready to go out of box. I like the fact that it has a magnetic and well as a stand.

Accuracy is pretty on point.Good structure quality.Good price.

The app is so glitchy. It doesn’t show historical data consistently and will skip dates when scrolling. The temperature takes a long time to update if you change from a hot to a cool location. Took it outside to calibrate for 2 minutes per instructions, then it took ages to show the accurate temperature once back inside. The screen is outdated technology. If you’re looking at it from the side the numbers are very faint even when charged.

Looks like a nice product but co2 level off by 200 plus points , I compared with another cheap brand, I initially thought the cheap branded one was off but then I took them outside and compared to what co2 level is published for my area and it turns out this one was the faulty one