Water Flow Sensor YF-S201

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< * [http://www.adafruit.com/products/828#Technical Details This page] says the calibration is Freq / 7.5 = L/min and pulses per litre = 450.

> * [http://www.adafruit.com/products/828#Technical%32Details This page] says the calibration is Freq / 7.5 = L/min and pulses per litre = 450.

Calibration:

This page says the calibration is Freq / 7.5 = L/min and pulses per litre = 450.
This page says 7.5 again