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.
Arrived within 2 weeks well packaged. Currently testing and working well.
quality is good
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!
Good product
As described
great value sensor Got it yesterday
fast delivey
CO2 sensor usage
😉