I have a basement with a sump pump mounted two feet below the floor in a tube. I'm looking for a way to detect if the water level has risen above a certain level. (Sump pump isn't working). Seems to me water sensor get corroded over time and become unreliable. So I think that leaves an ultrasonic sensor to measure the water level or simple float switches?Is one better/more reliable than the other?
Defective float switch.
I believe so. See the bulging at the end of red arrow? Not exactly sure how it works. I wonder what's in the float to trigger the when to turn on and off.