– DIGITEN G3/4" Water Flow Hall Sensor Switch Flow Meter Flowmeter Counter 1-60L/min

I tried two other versions of flow detectors. They required too greater flow to trip. With the addition of a bit of electronics these work VERY well. Detects a tap on very low flow rate. Also VERY good price.

Excellent product works brilliant

Great sensor!

This flow sensor works good with an Arduino Nano. I am using it to control an air injection pump cut in/cut out for my well water filter system. Installed Aug 2024 and runs 40-50 times/day for 10-15 secs each time and no issues so far except that it is louder than I expected when activated. I settled for this G thread (BSP) type only because there were absolutely no NPT flow sensors available on Amazon.ca rated at 60L/min. And the solitary NPT version I found on Amazon.com would not ship to Canada. I think that they would sell a lot more of them if they were made available in NPT.

The unit worked in tests and is accurate with the correct code on ESP 8266 D1 mini. Haven't installed because the threads appear to be BSP (British) which is more common not NPT (American) - close but not exact. Others have claimed to be NPT, but don't really back this up. I was going to get the Digiten brass equivalent (YF-B5) but doubt it would be NPT either. I think they make adapters if/when I continue this project Update: Had to buy adapters. finally finished project. By then the wires got wet (once) and are fraying. Now have to open sensor and replace wires. There is no protection where they enter the sensor - seems like all of them are like that though