weihenstephaner
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- Joined
- Jun 5, 2013
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A while ago I was looking for a way to monitor how far along my fermentation is without opening it and taking samples. I think I came up with something affordable.
Using an arduino nano and an MQ3 gas sensor I can measure the alcohol content of the gas bubbling out the airlock.
This is a photo of the gadget I came up with (being calibrated with a known alcohol solution), it reports the current reading to an android app on my phone over bluetooth. The yellow plastic thing is a 3d printed fitting that fits to a rubber stopper on the bottom and accepts a rubber stopper on the top. That way I can put it between the airlock and the bucket. Only problem is the sensor can't get wet, so I have to do it after there is any chance of foam over flowing.
I haven't tried it on an actual batch yet, but if this calibration works right I'll post the results when I do.
Using an arduino nano and an MQ3 gas sensor I can measure the alcohol content of the gas bubbling out the airlock.
This is a photo of the gadget I came up with (being calibrated with a known alcohol solution), it reports the current reading to an android app on my phone over bluetooth. The yellow plastic thing is a 3d printed fitting that fits to a rubber stopper on the bottom and accepts a rubber stopper on the top. That way I can put it between the airlock and the bucket. Only problem is the sensor can't get wet, so I have to do it after there is any chance of foam over flowing.
I haven't tried it on an actual batch yet, but if this calibration works right I'll post the results when I do.