The Meross Water Leak Sensor MS400H is a HomeKit-compatible leak sensor that can connect to your Wi-Fi network. The unit has three parts: the sensor itself, a new Meross hub, and the power adapter for the sensor. The sensor itself is about two inches long by one inch wide and just under an inch deep, so it should fit into most places where you want to place it. It has three prongs on the underside, which is how it detects water leaks. The prongs are also part of the pairing process with onboarding into Homekit, and I’ll cover the weirdness of that later.
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