Hadronix 1/4 Quick-Connect Food-Grade Water Flow Meter Hall Sensor HDRX-YF-S402B - Connectors Included - Arduino, Raspberry Pi, and Reverse Osmosis Filter Compatible

We never have any idea when our RO membrane should be changed. Our water is of fairly high quality before the RO so it’s hard to tell when the RO filter is letting stuff through. Now we can measure when to change. Attaching this to a counter (raspberry pi or others) can be a bit of a steep Learning curve but I found it a fun technical challenge. Once calibration is done this is meter is quite accurate. Built in push connections make installation as easy as LEGO.

I am giving this five starts because it has worked great so far after some initial testing. I will be looking forward to using it to automate the watering of my tomato plants in the future.

Simple to use. Just set up a rising edge interrupt to count the pulses and calculate flow volume and rate.

No instructions or schematics

Seems to work as advertised though the pulse rate seems a little inconsistent

This product works as advertised. Great flow meter. very accurate water control.

Works flawlessly with my automated home irrigation system.