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AquaticTechTank.net • View topic - G1/2" Water Flow Sensor Enclosure

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mistergreen
PostPosted: Sun Mar 08, 2015 2:37 pm 
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http://www.seeedstudio.com/depot/G12-Wa ... -1915.html

USD
$9.50

There should be little resistance with this as it has a rotor that spins with the flow of the water freely and the rate of the rotor is measured with a Hall Effect sensor (electromagnetic field).
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mistergreen
PostPosted: Sun Mar 22, 2015 10:01 am 
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mistergreen
PostPosted: Sun Mar 22, 2015 10:03 am 
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Ready for testing.
Make sure to add a 10K pullup resistor between signal & 5V.



I took 2 readings on a small canister filter with no medium.

The sensor does limit output but only by 5-11%. While the filter was running, the arduino read anywhere from 9-12L/minute. It varies I'm not sure why; maybe that's how filters run but I'd have to account for margin of error on the sensor and my errors. It might be better if I took multiple readings and average them out instead of take a calculation ever second.

It's fairly accurate with actual numbers being 11.13 l/m, and 10.97 l/m. I used my iPhone as the stop watch.
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