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I'd like to try a project like this kegbot.org but with the espruino. I'm a maker newbie, but I do know javascript and development methods. Do you think something like this is feasible? I searched but didn't see any work done on liquid flow meters in this forum.
Any other thoughts?
Awesome thanks for the quick reply. There's also this liquid flow meter which is less expensive, but more accurate. http://www.adafruit.com/product/828
It sounds like the same thing. The description seems like it will help with the math.
The sensor comes with three wires: red (5-24VDC power), black (ground) and yellow (Hall effect pulse output). By counting the pulses from the output of the sensor, you can easily track fluid movement: each pulse is approximately 2.25 milliliters. Note this isn't a precision sensor, and the pulse rate does vary a bit depending on the flow rate, fluid pressure and sensor orientation. It will need careful calibration if better than 10% precision is required. However, its great for basic measurement tasks!