Heiman Smart Water Leakage Sensor vs YoLink Water Leak Sensor 4

The YoLink Water Leak Sensor 4 wins overall on a higher owner rating, a longer warranty, and a deeper sensor, alert and integration set. The Heiman Smart Water Leakage Sensor stays cheaper and has a slightly better weather-resistance rating.

Freeze detection. The YoLink Water Leak Sensor 4 adds a low-temperature sensor with freeze-temperature alerts alongside water-leak detection, while the Heiman Smart Water Leakage Sensor detects water only.

Yes. It connects over YoLink's proprietary LoRa radio rather than WiFi, so a YoLink hub is required to relay alerts to the app and to other integrations.

The Heiman Smart Water Leakage Sensor is, carrying an IP67 rating against the YoLink Water Leak Sensor 4's IP66 rating.

Buyers who want the cheaper, more weather-resistant stand-alone alarm and don't need freeze detection or a hub.

Buyers who want freeze-temperature warnings alongside leak detection, a higher-rated sensor, and Alexa, IFTTT or Home Assistant support through a YoLink hub.