HomeKit Weekly: Shelly’s Flood S Gen4 is a low cost Matter leak sensor for Apple Home
9to5mac.com Sep 12, 2026

HomeKit Weekly: Shelly’s Flood S Gen4 is a low cost Matter leak sensor for Apple Home

AI-summarised brief · reviewed before publication

Shelly released the Flood S Gen4, a $30 leak sensor that uses three large stainless‑steel pads instead of metal pins, enabling faster detection of water, including low‑conductivity condensate. The compact unit fits under appliances, behind toilets, and beneath sinks. Matter‑certified, it supports Wi‑Fi and Zigbee, integrating with Apple Home, Google Home, Alexa, SmartThings, and Home Assistant. It offers flood and rain modes, three alarm profiles, and a two‑year battery life, with local alarms and phone notifications.

💡 Why It Matters

  • · By expanding detection coverage and simplifying installation, the Flood S Gen4 lowers the barrier for homeowners to protect against costly water damage, making proactive leak monitoring more accessible than ever.