OpenSprinkler Forums OpenSprinkler Mobile and Web App Flow Sensor? Reply To: Flow Sensor?



A quick google seems to suggest around 5-20mhz for GPIO on the rpi, not sure about interupts.

I am looking at a flow sensor here in Australia, here are the specs

Measurement range              1.0 – 60 LPM
Calibration      Flow(LPM)      = f(H2) x
23.8 (should be a divide by bar above the 23.8 so it looks like f(H2) x OVER 23.8)
Repeatability   <= 1%
Accuracy                                   <=2.5% of FULL SCALE
Protection class                       IP65
Max uid temperature            60  C
Max ambient temp range      0  C – +60 C
Max uid pressure                    1.5 Mpa
Operating voltage                    +5V
Output                                        frequency square wave

I’m unsure of what the (h2) and x is in the calibration. Would something like this work ok though?