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  • October-30 2020 11:20:03

    The line "After the sensor is energized, it needs to be preheated for about 20S, and the measured data is stable. The heating of the sensor is a normal phenomenon, because there is a heating wire inside, if it is hot, it is not normal." is rather confusing in the product description, but it works as intended.

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  • November-23 2020 14:36:21

    Arrived within 2 weeks well packaged. Currently testing and working well.

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  • February-01 2020 22:37:48

    quality is good

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  • April-23 2019 15:10:35

    I bought this to use for a DIY smoking room filter. It senses tobacco smoke very well despite what you read online about this not being the best for smoke. Awesome value for the price!

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  • November-20 2019 07:55:18

    Good product

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  • September-11 2019 23:02:22

    As described

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  • August-26 2019 01:40:52

    great value sensor Got it yesterday

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  • July-31 2019 12:39:32

    fast delivey

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  • July-30 2019 10:57:05

    CO2 sensor usage

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  • January-26 2019 18:19:12

    😉

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