Would it need power even though I'm only using the board that has the two traces on it? I can't see how it's any different than having two bare wires hooked up to a break out box that get connected from water that overflowed the sump.https://www.aliexpress.com/item/328...&terminal_id=e89304082e874ec1aded0eb9f92746a0
THe one you show needs power to work (according to the specs)