2Pcs YF-S201C DC3.5-24V G1/2" Transparent Flow Sensor Turbine Flowmeter Water Flow Sensor Transparent Water Flow Meter YF-S201C Range 1-30L/min

Really nice addition when replacing a water sensor in my tankless water heater. The old one was all black and you couldn't see what was going on inside the device.This one is clear and you can see the water moving and the device inside spinning. Wonderful now I can tell visually if it is working!The wires were too short for me so I soldered on some extra wire and covered the joint with heat srinkable tubing.

My application is on the lower side of it's secified flow range. So just abit above 1 l/m but it really doesn't work at that flow rate. The wheel constantly keeps stoppingeven though water is flowing constnatly.At higher flowr ates this might be ok but if you have anything close to the low end of the specified flow rate. Get something else.

Developing some pool monitoring equipment. This was for my prototype. Worked great and the 300 pulses per liter is pretty close. Just be aware that signal wire is high and drops to low when a pulse is sent. Connected to an ESP32 and used a falling edge interrupt. got it to about 15 gal / min on a garden hose.