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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

    bon petit module et rapide a laffichage des donnees

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  • 02/04/2021

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

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  • 27/07/2021

    Barang sudah diterima, pelayanan cepat dan berfungsi baik

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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

    ottimo prodotto, appena mi è arrivato non ho resistito a provarlo. L'ho acceso, ho visto che aveva una buona carica. L'ho subito messo al lavoro ed ho potuto constatre la differenza tra la qualità dell'aria della mia stanza d'ufficio e quella esterna della mia città. Si è spostato subito il cursore sul giallo. Ora devo capire meglio i valori e limiti dei valori e non limitarmi alle indicazioni del colore. Prodotto molto valido che mi sento di consigliare. starei pensando di comprarne un altro per usarlo in casa ufficio villa etc

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