2021-06-15, 09:21 PM
yes, ultrasonic is very intersting but I am skeptical of the accuracy especially at low speeds as the time of flight is quite fast. You generally need two transducers. Now, if you could separate them by several meters the accuracy could get much higher.
In theory a paddle wheel style water speed sensor should work in both directions, but not sure all of them are able to tell you which direction they spin without 2 magnetic sensors.
In theory a paddle wheel style water speed sensor should work in both directions, but not sure all of them are able to tell you which direction they spin without 2 magnetic sensors.