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4.9 out of 5
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  • 24/07/2021

    Compared it to values from BME280 and CJMCU-30: CO2 good, temperature 1degC off, humidity 11% off, TVOC: have no formula to convert mg/m3 to ppb. Overall good value for price.

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  • 30/04/2021

    Good little module and quick to view the data

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  • 02/04/2021

    I think its working well.....thangs!!!!

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  • 27/07/2021

    Goods received, service is fast and functional

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  • 24/07/2021

    NO COMPROMISE, SUPER....

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  • 07/04/2021

    hızlı kargo

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  • 05/04/2021

    Good easy to read display and reasonable battery life of a few hours. But the main CO2 measurement seem to respond to literally everything, not just CO2 - the readings are very high in comparison with another CO2 detector I have. Also the HCHO and TVOC numbers seem to be derived directly from the 'CO2' readings only, they are not specific at all? So my impression is that it is using one single general air quality detection device, which is sensitive to everything? So the specific readings are inaccurate and not very significant. However having said that, it is a very sensitive device for general air quality and the bar style display at the bottom is a very good general indicator of air quality.. For the low price it's still useful and worth having.

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  • David
    CA
    23/05/2021

    Takes a 12 hours or so to stabilize the readings, very informative as C02 can fluctuate from high readings of 2000 to low readings of 400, I find opening the windows does affect the readings, as it goes to 400, so it seems to be accurate. II would like to compare it to another meter to be sure. Both TVOC and HCHO are very low. Surpris3d by who much C02 can accumulate in a short period of time. No power supply included, only a USB cable. Excellent colour display,

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  • 24/07/2021

    Don’t buy it. It’s a piece of crap. It’s now showing 31 degrees Celsius but it’s around 24 degrees Celsius where I live. Don’t you waste your money!

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  • 21/09/2021

    great product, as soon as I got there I could not resist trying it. I turned it on, I saw that it had a good charge. I immediately put it to work and I could see the difference between the air quality of my office room and the air quality of my city. You immediately moved the cursor to yellow. Now I have to better understand the values and limits of the values and not limit myself to the indications of color. Very valid product that I would recommend. I would be thinking of buying another one to use it in home office villa etc

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