Temtop CO2 Monitor Indoor Air Quality Monitor Portable Carbon Dioxide Detector CO2 Temperature Humidity Meter for Home Office School

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

Good item, helps a lot

Had been looking for a CO2 monitor as required for conversion works under building regulations. This one seems to fit with the requirements and does what it says in the description. Looked at cheaper monitors but was put off by bad reviews. Don't know how accurate this is as I don't have any way to test it and don't know how long it will last. Easy to set up and battery life on eco mode seems good.

I was sceptical at first, but wow! the battery last for ages and the item is super accurate. great value for money and super portable. the stand is magnetic so it can be folded up and taken home in a small bag if you don't want the cleaner to run off with it :)

Is a great addition to any living room when having guest over our living room becomes stuffy really quick so helps avoid headaches

A very decent and well put together piece of equipment. The measuring is quick and it's very clear. It deserves five out of 5, but the documentation lacks in two areas: although it's extremely well-produced, it is written for people doing a test at the opticians: at least half the size of what it should be with very small fonts. Also, it could be reorganised to put the calibration part at the front. It is nicely printed and care has been taken to write it clearly, more is the pity it's not printed in a bigger size format/font. 4/5.

Just wish it also had a clock on it!

Works well in eco mode - a new reading every 10 minutes is fine unless levels are changing rapidly. You can easily switch to active mode if needed. Long battery life and easy recharge are great.

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。

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

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.