SwitchBot Leak Detector

Quick verdict

A cheap and cheerful water leak sensor. Drop it under a sink or behind the washing machine, and it will scream if it gets wet, even without smart home connectivity. For Home Assistant, it works over Bluetooth or Matter via a Hub. At this price, buy a handful and scatter them at every water point. The only real limitation is no probe cable, so it only detects water directly at the sensor location.

Standout: Affordable water leak detection with a local Bluetooth connection and Matter upgrade path.

Last checked: 2026-03-22

Compatibility snapshot

Why it stands out

• budget-friendly water leak sensor with Matter upgrade path via Hub
• loud built-in alarm sounds even without smart home connectivity
• compact design fits under sinks, behind toilets, and near water heaters

Reasons to hesitate

• Bluetooth range means you might miss alerts if your phone or server is too far away
• Hub required for reliable remote notifications and Matter integration
• no probe cable, so it only detects water directly under the sensor

Best for

• placing under sinks, near water heaters, and in basements for early leak detection
• SwitchBot users who want affordable water monitoring integrated with Home Assistant

Avoid if

• you need a rope-style sensor to cover a large area, so look for probe-cable models
• you want instant remote notifications without buying a Hub

Privacy and local-control notes

Reports wet/dry state over Bluetooth locally. Hub adds WiFi connectivity for Matter and remote alerts. Minimal data collected.

Home Assistant support: supported · integration path: SwitchBot / Matter.

Buying reality check

Price notes: Very affordable. Buy several to cover all the common leak points in your home.

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