Meross Smart Water Leak Sensor vs Shelly Flood Gen4 (2026)

Updated September 2026

Data from Amazon and official Meross and Shelly sites.

2026 verdict

Freeze alerts versus leak-only sensing, IP44 versus IP67 weather resistance is the split, and the Shelly Flood Gen4 is the water leak sensor that takes 2 years of battery life.

Winner

Shelly Flood Gen4

$39.99

Buy on Amazon USA

Add a wider sensor set, richer alert options, and a 3-year warranty and the gap is structural, not a sale price. Shelly Flood Gen4 can warn about freeze conditions, while Meross Smart Water Leak Sensor is built for leak contact only. Meross Smart Water Leak Sensor keeps IP67 weather resistance and the more affordable option, so it remains the pick when that priority beats 2 years of battery life. Shop the Shelly Flood Gen4 unless IP67 weather resistance is the only thing you came for, in which case the Meross Smart Water Leak Sensor is enough.

Meross

Meross Smart Water Leak Sensor

$23.99

Buy on Amazon USA

Winner

Shelly

Shelly Flood Gen4

$39.99

Buy on Amazon USA

Price alerts

Water Leak Sensor prices change while you decide

We check the price of every Water Leak Sensor in the catalog daily and email you the drops, whichever one you pick.

Your subscription could not be saved. Please try again.

Your subscription has been successful.

Feature	Meross Smart Water Leak Sensor	Shelly Flood Gen4	Winner
Price	$23.99	$39.99	Meross Smart Water Leak Sensor
Rating	3.7	4.2	Shelly Flood Gen4
Warranty	1 year	3 years	Shelly Flood Gen4
Weather Resistance	IP67	IP44	Meross Smart Water Leak Sensor
Battery Life	1.5 years	2 years	Shelly Flood Gen4
Connectivity	Other	2.4 GHz WiFi, Bluetooth, Zigbee	Shelly Flood Gen4
Integrations	Apple HomeKit, Samsung SmartThings, Home Assistant	Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter	Shelly Flood Gen4
Sensors	Water Leak	Water Leak, Temperature	Shelly Flood Gen4
Alerts	Water Leak Alerts	Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts	Shelly Flood Gen4
On Device Alert Light	NO	YES	Shelly Flood Gen4
On Device Alert Sound	YES	YES	Tie

Meross

Meross Smart Water Leak Sensor

$23.99

Buy on Amazon USA

+ Price: $23.99
+ Weather Resistance: IP67
- Rating: 3.7 vs 4.2
- Warranty: 1 year vs 3 years

Winner

Shelly

Shelly Flood Gen4

$39.99

Buy on Amazon USA

+ Rating: 4.2
+ Warranty: 3 years
+ Battery Life: 2 years
- Price: $39.99 vs $23.99
- Weather Resistance: IP44 vs IP67

Frequently Asked Questions

Which is better overall: Meross Smart Water Leak Sensor or Shelly Flood Gen4?

The Shelly Flood Gen4 is better overall as a water leak sensor. It wins on 2 years of battery life, a wider sensor set, and richer alert options. The Meross Smart Water Leak Sensor is the alternative when you want IP67 weather resistance and the more affordable option.

What is the biggest difference between the Meross Smart Water Leak Sensor and the Shelly Flood Gen4?

Freeze coverage. Shelly Flood Gen4 can alert on low temperature as well as leaks, while Meross Smart Water Leak Sensor is leak-only.

Which water leak sensor lasts longer on batteries, the Meross Smart Water Leak Sensor or the Shelly Flood Gen4?

Shelly Flood Gen4 is rated for 2 years, and Meross Smart Water Leak Sensor is rated for 1.5 years. That is the published battery spec, not a store claim.

Can the Meross Smart Water Leak Sensor and the Shelly Flood Gen4 warn about freezing pipes?

Shelly Flood Gen4 lists freeze alerts as YES. Meross Smart Water Leak Sensor does not list freeze alerts. If basement freeze coverage is the reason you are shopping, pick the sensor that actually publishes that alert.

Who should buy the Meross Smart Water Leak Sensor?

Buy the Meross Smart Water Leak Sensor if IP67 weather resistance is the priority, along with the more affordable option. Choose the Shelly Flood Gen4 instead when 2 years of battery life matters more than those extras.

Who should buy the Shelly Flood Gen4?

Buy the Shelly Flood Gen4 if 2 years of battery life is the priority, along with a wider sensor set and richer alert options. Choose the Meross Smart Water Leak Sensor instead when IP67 weather resistance matters more than those extras.

Full comparison table

Compare all 32 Water Leak Sensors side by side

You are looking at two of them. The full table lines up all Water Leak Sensors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.