I just got two sensors and I am kind of disappointed.
I measured the repeatibility of the measurement and it was terrible.
I wanted to use those to measure how much beer I have left in my keg but I am not sure ig those sensors can be used for this.
When the flow is slow (which sometimes happens when you want to avoid foaming) the number of pulses generated by the sensor is about half of what it is when liquid flowing with high velocity. For 0.5l water (i measured the amount passed by puring to the measured device) the difference in number of “ticks” is big I got about 121 tick with slow flow and 240 with water tap fully open…
I think this sensor is not good to use in the systems where you often stop/start the flow.