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  • Tnx DrAzzy, it looks like Dout is like you said, some kind of alarm pin (HIGH/LOW), Aout giving value from 0-2volts (that is from the auction description) but I measured that when I power it by 6V high efficient power supply then have something like 1.07volt at the beginning and when I blew on the sensor got minimum of 0.73volt (however it depends what level of gain you use, there is small potentiometer - but it's not changing it from 0 to 2 volts as I seen)
    so, 0.73-1.07volt in my case should be 'map' to 400-10000ppm


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