We have a water fountain in the backyard that has an electric pump. The pump is connected to a smart switch. I’d like to add some sort of water level sensing switch to prevent the pump from running if the water is too low.
Looking for ideas. It obviously needs to be weather resistant. I have electrical out there so it doesnt need to be battery.
If you have wifi coverage their you could use this diy project posted by tom:
I’m using to tell me if a sump pump isn’t working as expected (water gets to the sensor). But if you just reverse the logic (water not on sensor) you could use it for your application too, i think.
Put it in a waterproof plastic project box and it should cost less than $15.
You just need an Auto-Shutoff pump. They have a built in “float” (I think it’s actually a photosensor of some sort) to shut off if the water level is low.
Does the smart switch have voltage sensing? Have you graphed it’s use? It’s possible that the amp pull will be slightly higher when the pump is under load/fountain full vs empty. Another option would be a inline flow sensor.
Only issue with this is there would be no alert for us to let us know the water is low and needs to be fillled. But would be the most safest. Maybe still use this type pump just for security in case whatever switch I use, fails.