SwitchBot claims its new Water Leak Detector can not only alert you to leaks and drips but also monitor water levels, thanks to an optional immersion cable.

This sounds handy for warning you if your fish tank is draining, your bathtub is too full, or your sump pump levels are rising. It doesn't need a hub, works over Wi-Fi, and costs $17.99 ($19.99 with the cable).

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