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Small white square water-leak sensor with gold contacts 18 months battery life

Shelly

Shelly Flood Wireless Smart Flood Sensor 18 months

SKU CH-JGHY-MHM8C

Wireless water-leak detector with temperature sensor, 18-month battery life and instant phone alerts

  • Parts warranty2 Years
  • Wireless Wi-Fi operation with no hub required
  • Instant leak alerts sent to your phone
  • Up to 18 months battery life for long reliability
  • Built-in temperature sensor monitors floor heating
  • Compact wire-free design fits anywhere leaks may occur

Smart Wi-Fi Leak Sensor

The Shelly Flood is a compact wireless water leak detector with built-in temperature measurement. It connects directly to a Wi-Fi network without a separate hub and runs on battery power for up to 18 months. The device sends instant alerts to iOS and Android apps when liquid is detected, making it suitable for homeowners and renters who want early warning of leaks under appliances or pipes.

Battery Life Under Daily Use

The sensor is designed to operate for up to 18 months on its internal battery under typical monitoring conditions. It reports temperature fluctuations and leak events over Wi-Fi without requiring wired power. Extended operation depends on the frequency of alerts and the stability of the wireless connection in the installation location.

Replaces Standalone Alarms

This unit replaces basic battery-powered water alarms that only sound a local siren. The jump is worth it when you need remote notifications, temperature tracking, or automated scene triggers with other smart relays. It is not for installations that require a hardwired sensor, a dedicated hub, or integration with proprietary security panels.

How it compares

Measured against everything we stock in Solenoid & Power Relays, at today’s prices. Recalculated every night.

Price $18.99
Cheaper than about 63% of the 125 comparable items (median $26.99).

Specifications

Product
Brand nameShelly

Questions about this item

How long will the battery last if the sensor stays active around the clock?

The built-in battery is rated for up to 18 months of continuous operation before it needs replacing.

What network equipment must I already have for the sensor to send alerts to my phone?

A Wi-Fi router with internet access is required; the sensor connects directly to the network without a separate hub.

Will this sensor work alongside my existing Shelly Plus 1 or Plus 1PM relays to automate water shut-off or heating control?

Yes, it can trigger those relays to close a water valve or regulate floor heating when a leak or temperature change is detected.

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