I have a drainage pump with a level sensor. I'd like to have some protection in case of failure of the level sensor, which would leave the pump running dry while I'm not around, eventually leading to pump failure.
Basically I'm looking for something like a timer switch, but rather than starting at a programmed time and running for e.g. 10 minutes, it should start the countdown once it detects enough current being drained (say > 1 A), and cut off the power supply if it's still draining > 1 A after 10 minutes.
Does anyone know of such a product?