How It Works

1
Set up your Zigbee hub first
You need a Sonoff Zigbee Bridge Pro (or NSPanel Pro) on your eWeLink account. The leak sensor pairs through it, not direct to Wi-Fi.
2
Pair in eWeLink
Open eWeLink → your Zigbee hub → Add Device. Hold the button on the sensor until the LED pulses, then accept in the app.
3
Place it on the floor at the risk spot
Lay it flat with the two metal probes touching the floor. Behind the washer, under the water heater, beside the sink - wherever a leak would start.
4
Set an auto-shutoff scene
If you also have the smart water valve: in eWeLink, create a scene "leak detected → close valve". You're now protected even when you're not home.

Is This Right for Me?

Protocol: Zigbee 3.0
Hub required: Sonoff Zigbee Bridge Pro or NSPanel Pro
Detection sensitivity: Water as shallow as 0.5 mm
Battery life: 5+ years (typical)
Local buzzer: Built in
Tamper alert: Yes - notifies if someone removes the sensor
Detection cable: Add an external probe cable to cover a wider area
App: eWeLink (via Zigbee hub)

Product Details

Sonoff Zigbee Water Leak Sensor (SNZB-05P)

Place this sensor on the floor near a water heater, washing machine, sink, or AC unit, and it will alert you instantly if it detects a water leak – even a small one (as little as 0.5mm). It uses Zigbee (a wireless smart home protocol that connects devices through a hub), so it works through a hub and stays connected even if your internet goes down.

A small device that can save you from expensive water damage.

Key Features:

  • Detects Tiny Leaks: Triggers an alert for water as shallow as 0.5mm.
  • 5+ Year Battery: Long-lasting battery – set it and forget it.
  • Extend Detection Area: Add water detection cables to cover larger areas.
  • Works Offline: Zigbee-based – alerts work even without internet.
  • Smart Automations: Pair with a smart water valve to automatically shut off the water supply when a leak is detected.
  • Loud Buzzer: Built-in alarm sounds when water is detected.

💡 Pro Tip: Place one behind your washing machine and another under your water heater. Pair with a smart water valve – if a leak is detected, the water shuts off automatically before any damage is done.

What You Get

Catches the smallest leaks
Senses water as shallow as 0.5 mm - long before you'd see it on the floor. Catches drips before they become floods.
Instant phone alert
Push notification the second water hits the probes. You hear about a leak whether you're upstairs, at work, or abroad.
Built-in buzzer
Loud local alarm so anyone in the house knows immediately, even without their phone.
5+ year battery
Zigbee draws tiny power. One CR2032 battery lasts longer than most lease renewals. Set it and forget it.
Pair with a smart valve
Set an automation: leak detected → close the main water valve. Runs locally on the Zigbee hub even with no internet.

A Closer Look

Sonoff Zigbee Water Leak Sensor | SNZB-05P

Connect the sensors to a smart home hub (like Zigbee) for centralized monitoring.

Sonoff Zigbee Water Leak Sensor | SNZB-05P

Installation Locations

Place the SNZB-05P sensors near water heaters, under sinks, behind appliances (like dishwashers and washing machines), and in basements or crawl spaces.

Installation Locations

Cost Savings

Preventing water damage can save significant repair costs and reduce insurance claims. This use case highlights how the SNZB-05P Water Leak Sensor can be a crucial part of a smart home’s water management system, enhancing safety and efficiency.

Cost Savings

Early Detection

The sensor alerts the homeowner immediately, allowing for prompt action to prevent extensive water damage.

Early Detection

Peace of Mind

Knowing that potential leaks are monitored gives homeowners confidence, especially when away from home.

Peace of Mind

Common Use Cases (1)

Real scenarios Lebanese customers use this product for. Don't see yours? Message us and we'll tell you if it fits.

Leak Alert
get a notification on your phone the moment a water leak is detected - before it causes damage.
See 1 product

Works With

Amazon Alexa
Works
Google Assistant
Works
eWeLink Scenes
Works
Sonoff Zigbee Smart Water Valve (for auto-shutoff)
Works
Home Assistant (via Zigbee2MQTT or ZHA)
Works

Control with the eWeLink app

eWeLink app icon
eWeLink
Set up your Sonoff Zigbee Water Leak Sensor | SNZB-05P in minutes - voice control, scenes, automations, away mode.
App Store Google Play
View app

What's in the Box

1× Sonoff SNZB-05P water leak sensor
1× CR2477 battery (pre-installed)
User manual (English)

Delivery & Pickup

Standard Delivery
All Lebanon governorates - Greater Beirut usually next day; Tripoli, Jbeil, Saida, Tyre, Zahle, Akkar and the rest within 2–4 working days.
4 $ · Free over 50 $
Express Delivery
Faster shipping - usually within 24 hours of order confirmation (Greater Beirut & Metn). Same-day not guaranteed.
6 $ flat
Pickup - Dekwaneh
Collect from our Dekwaneh store. Weekdays 10am–5pm, Sat 10am–1pm.
3 $ · Free over 30 $

Warranty & Support

6-month Local Warranty
Covers defects in materials & workmanship. Handled here in Lebanon.
WhatsApp Support - Always On
Can't set it up? Message us. We reply within minutes, not days.
14-day Exchange - Unopened Items
The item must be unopened and in its original packaging. Exchange it for a product of equal or higher value - we do not give cash refunds. Opened items are covered by the warranty if there is a factory defect.
Free Setup Call
If you get stuck, we'll walk you through the setup on a free WhatsApp call.

Customer Reviews (1)

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Frequently Asked Questions

Does it need Wi-Fi or a specific app? ›
It uses Zigbee, not Wi-Fi. You need a Sonoff Zigbee Bridge Pro (or NSPanel Pro with built-in Zigbee) on your eWeLink account. Once paired, alerts show in the eWeLink app.
Does the sensor have its own alarm? ›
Yes - there's a built-in buzzer that sounds locally the moment water is detected. You also get a phone notification via eWeLink at the same time.
What's the detection cable for? ›
An optional add-on. The base sensor has two probes on its bottom. Add the detection cable to extend the sensing area - useful around the perimeter of a water heater or the base of a washing machine.
Can I add several sensors to one Zigbee hub? ›
Yes - a single Sonoff Zigbee Bridge Pro handles dozens of sensors. Put one behind the washing machine, one under the water heater, one in the kitchen. All visible in one eWeLink dashboard.
Will it work if the internet is down? ›
Yes - that's the point of Zigbee. The sensor talks to the hub locally, and local automations (like "close the smart water valve when leak detected") run even with no internet. You just miss the push notification until internet returns.
Can I auto-shut the water supply? ›
Yes - pair with the Sonoff Zigbee Smart Water Valve. Set an automation in eWeLink: "if leak sensor triggers → close water valve". A leak that would have flooded the house becomes a 30-second auto-response.
Where should I place it? ›
The highest-risk spots in Lebanese homes: behind the washing machine, under the water heater, beside the kitchen sink trap, and beside the AC indoor unit (condensate drain leaks). Put one in each spot for layered protection.

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