Flume 2 Smart Water Monitor vs YoLink Water Leak Sensor 4

The YoLink Water Leak Sensor 4 wins overall, with a lower price, a higher owner rating, freeze and low-temperature detection, and an on-device alarm that fires even without the hub or internet. The Flume 2 Smart Water Monitor answers with wider connectivity and more integrations, including Google Home, which the YoLink does not support.

What they monitor. The YoLink Water Leak Sensor 4 is a point sensor that also watches for freezing temperatures near the pipe or fixture where it sits. The Flume 2 Smart Water Monitor reads the whole home's water meter instead, so it catches any leak on the property, but it has no temperature sensing at all.

No. It only reports water flow through the meter and has no temperature sensor or freeze alerts. The YoLink Water Leak Sensor 4 does include both, alongside standard water-leak detection.

The YoLink Water Leak Sensor 4 does. It has an on-device alarm and alert light that trigger locally at the sensor itself, independent of the hub or internet connection. The Flume 2 Smart Water Monitor has no onboard siren, every alert goes through its app.

Buy it if a point sensor that also warns about freezing pipes, with a loud independent alarm and long LoRa range from a YoLink hub, is needed for spots like a water heater, a sump pump or an unheated crawlspace.

Choose it if tracking the entire property's water use across more smart home platforms matters more than temperature-aware protection at individual fixtures.