I am building an aquarium gravel cleaner and am looking for sensors that could (eventually) be used for autonomous navigation. I want to know when the robot bumps into walls or obstacles.
What waterproof sensors are available and small enough for a six inch robot? I was thinking a limit/bump switch would be easiest and wouldn't hurt the fish. Thanks!
Can you show us some images of your robot?
I'd start with a look at the robots used to clean swimming pools.
Endstops seem good. Just get waterproof ones.
EDIT - And don't get the ones mounted in the PCBs.
Add IP68 as a search keyword if you want waterproof sensors.
Perhaps a proximity sensor with a food-safe housing to detect fish.
As switches you can use reed relay.
It is sealed inside the glass and operated from the outside by a magnet.
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