YoLink Water Leak Sensor 1 vs YoLink Water Leak Sensor 4

The YoLink Water Leak Sensor 4 wins overall, thanks to a built-in low-temperature sensor with freeze-temperature alerts and a 105dB on-device siren that the YoLink Water Leak Sensor 1 lacks. The YoLink Water Leak Sensor 1 keeps a slightly higher IP68 weather-resistance rating in its favor.

Alerting hardware. The YoLink Water Leak Sensor 4 has an on-device 105dB siren and alert light plus a temperature sensor for freeze warnings, while the YoLink Water Leak Sensor 1 is a silent puck that only reports water leaks through the app, email or text unless you add a separate YoLink siren.

The YoLink Water Leak Sensor 1 carries an IP68 rating, built to survive full submersion, while the YoLink Water Leak Sensor 4 is rated IP66 for heavy splashing. Both are still well protected for typical placements under sinks, water heaters and sump pumps.

No. Only the YoLink Water Leak Sensor 4 has a temperature sensor and sends freeze-temperature alerts; the YoLink Water Leak Sensor 1 reports water leaks only. Both otherwise share the same LoRa radio, YoLink hub requirement and roughly five-year battery life on two AAA cells.

Choose it if you already run a YoLink deployment and only need leak detection without a local siren, or if the higher IP68 submersion rating matters for how the sensor gets placed.

Choose it if you want a loud on-device alarm that still fires when the hub or internet is down, plus freeze-temperature warnings alongside leak detection, useful for water heaters, sump pumps and pipes at risk of freezing.