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

Great device and easy to use . I found an area right by my bed that was high and was able to correct it .

This was tested against a very expensive co2 meter that I borrowed from a friend who works in confined spaces. It was very close there was 18 point difference. This was very affordable. The read out is not very high in contrast but it is readable. The temp and humidity levels appear to be accurate as well tested side by side my analog wall meter which I usually tap on. There is no backlight on this. The readout is equal to a large calculator. I am very happy with this purchase especially for what it cost. It is rechargeable so I don't have to purchase additional batteries.

This monitor is doing exactly what I was hoping it would do. Easy to set up and easy to read. This information provides the peace of mind that I needed after a family member had accidentally been running a vehicle in an enclosed garage.

EDIT 11/13/24: The manufacturer reached out to me and wanted to make things right. They offered to refund or send me a new one free of charge. I opted for a new one to see if it will fare any better than the original. I’m hoping it holds up better since I do like the simple display a lot. I adjusted my review to 4 stars for the responsive customer service, but I’m still keeping a star docked for the hiccups with the initial unit. I’ve only been using my monitor for 4 months, and the screen has lost its ability to fully display the numbers. When it was working, the CO2, temperature, and humidity data seemed to be pretty accurate and the battery life is long, but it’s unacceptable for a screen to be dying like this after such a short amount of time. It looks similar to a calculator screen, and those things last forever so I’m not sure why these fail so quickly.

This CO2 monitor is actually one that I enjoyed until recently. When I first got it, I followed the instructions and calibrated the device, all was well. Then a few weeks later, I noticed something strange, the CO2 number wouldn't adjust. It has two modes, eco and automatic, and whether you set it to either it doesn't adjust the reading. It only does so once you press the button and I suppose it turns it on, but it's supposed to be on 24/7 automatically regardless. So I'm kicking myself for not just getting the aranet4 detector instead, I thought I would save money going for this one because it's cheaper but the damn thing doesnt work properly, from what I can tell the readings are somewhat accurate but I don't have another CO2 monitor to validate that.

Works great

Great co2 monitor

This has been super helpful in monitoring the temperature and CO2 in my apartment bedroom. Easy to use, battery lasts for days. Just wish it had a subtle backlight so that I could get a reading at night without turning on a light.

good item

Fonctionne parfaitement. Mode d'emploi sur i ternet en français. Je le conseille .

半額でChina製の知らないメーカーを買おうとしたけど（Temptopというメーカも知らなかったが）、１年以内に壊れたというレビューを複数見て、この商品は２倍値段がするが、外国のレビューが高かったので購入した（日本人レビューはなし）。小型で表示も見やすく、CO2、温度、湿度とも正確に素早く表示するので安物買わなくてよかったと思った。アプリをダウンロードしてスマホでいろいろとデータ見たり、時刻をこのモニターに表示できたりできるようだけど、なぜかスマホとbluetoothで繋がらない。CO２濃度だけ見れればいいので、面倒だから繋げないで使用している。

Very simple and efficient monitor for quick checking of air quality.

Works well. Portable and reliable CO2 measurement. Showed I needed more fresh air in the bedroom at night since otherwise 2100ppm CO2 with door and window closed, and also working in home office, I need to air the room for 10 minutes every couple of hours when the reading reaches 1300ppm. It has an internal rechargeable battery, USB-C rechargeable. I have been using it for 2 weeks now and have not charged it all yet! It takes approx. 1 minute to react to increased CO2 and 5 minutes to react to a reduced level. I turned off the alarm feature as that would be irritating at night. When outside it reads 450ppm, breathing directly on it gives 5000ppm.