I bought this :
It was cheap only US$ 1.15. It worked just two hours underwater.
AliExpress seller says he has tested the product. But speciferar only that he tested the electrical data.
I do not think he understands what Waterproof means.
Has anyone here in the forum had the same experience waterproof sensors. I bought three so I’ll try to make watertight .The leaked one had connecting wires got rust.