💧 SONOFF SNZB-05P — Zigbee Water Leak Sensor
Detect leaks as small as 0.5 mm before they become floods. The SNZB-05P is a Zigbee 3.0 water leak sensor with an elevated probe design, concave drip collection, IP67 waterproof rating, and a 5-year battery life. Expand coverage with the optional WLDC200 detection cable — daisy-chain multiple cables with no length limit. MPN: SNZB-05P.
💧 Water Leak Detection
⚡ Key Features
- 0.5 mm Leak Sensitivity — elevated gold-plated probe detects liquid levels as low as 0.5 mm, even on metal surfaces without false triggers
- Drip Detection — concave water collection design captures drips and stops leaks at the source before they spread
- Extended Cable Detection — connect the optional WLDC200 cable (2 m) for wide-area or narrow-space monitoring; daisy-chain multiple cables with no length limit
- IP67 Waterproof & Dustproof — rated for short-term immersion, reliable in humid bathrooms, basements, and under appliances
- 5-Year Battery Life — powered by a CR2477 coin cell battery for years of maintenance-free protection
- Real-Time Alerts — instant push notifications to your phone via the eWeLink app when water is detected
- Local Zigbee Alarms — triggers gateway sound alarm via Zigbee local scenes even when WiFi is down
- Repeat Alerts — reports every 10 minutes during continuous water detection to prevent missed notifications
- Zigbee 3.0 — requires a Zigbee hub (NSPanel Pro, ZB Bridge-P, ZBDongle-E, iHost, SmartThings, etc.)
- Home Assistant Compatible — integrates via ZHA or Zigbee2MQTT with any Zigbee coordinator
- Smart Scene Linkage — trigger automations when water is detected: sound alarms, close valves, send notifications, turn on lights
🏠 Where to Place
Bathroom & Laundry
Place under the washing machine, dishwasher, or basin. Detects leaks from hose connections, pipe joints, and overflows.
Basement & Garage
Extend coverage with WLDC200 cables along walls and under water heaters. First line of defence against flooding.
Kitchen
Tuck under the sink or behind the fridge. Concave drip design catches slow leaks before they damage cabinetry.
Server Room & Office
Run detection cable around the perimeter of sensitive equipment. Zigbee local alarms work even without internet.
🔌 WLDC200 Detection Cable — Expand Your Coverage
The WLDC200 cable (2 m) plugs directly into the SNZB-05P sensor and extends the detection zone along floors, under appliances, or around pipe runs. Multiple cables can be daisy-chained in series with no length limit — cover an entire basement, server room, or commercial space. The cable detects water anywhere along its length, not just at the tip. Sold separately.
🏠 Build a Water Protection System
SONOFF WLDC200 Water Leak Detection Cable
2 m detection cable for the SNZB-05P. Extend coverage along floors, under appliances, or around pipes. Chain multiple cables with no length limit.
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eWeLink Smart WiFi Water Valve (DN15)
Motorised ball valve that shuts off your water supply remotely or automatically via eWeLink smart scenes. Pair with the SNZB-05P for auto-shutoff on leak detection.
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SONOFF ZB Bridge-P
Zigbee-to-WiFi gateway for the eWeLink ecosystem. Required to connect the SNZB-05P to the app and enable push notifications and smart scenes.
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SONOFF NSPanel Pro 120
Built-in Zigbee hub with sound alarm. When the SNZB-05P detects water, the NSPanel Pro sounds an audible alarm even without internet.
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📋 Technical Specifications
| Product | SONOFF Zigbee Water Leak Sensor |
| MPN / Model | SNZB-05P |
| Type | Zigbee 3.0 Water Leak / Flood Sensor |
| Detection Sensitivity | 0.5 mm liquid level |
| Detection Methods | Elevated probe (leak) · Concave drip collector · External cable (WLDC200) |
| Waterproof Rating | IP67 (short-term immersion) |
| Protocol | Zigbee 3.0 |
| Hub Required | Yes — NSPanel Pro, ZB Bridge-P, ZBDongle-E, iHost, SmartThings, etc. |
| Battery | CR2477 (3V) — 5+ years estimated life |
| Alerts | Push notification (eWeLink) · Gateway sound alarm (Zigbee local) · Email & SMS (eWeLink advanced plan) |
| Repeat Alert | Every 10 minutes during active leak |
| Home Assistant | ZHA · Zigbee2MQTT (requires Zigbee coordinator) |
| Dimensions | 48 × 48 × 21.6 mm |
| Weight | 45 g |
| Casing | PC + ABS |
| Operating Temp | -10°C to 60°C |
| Compatible Cable | WLDC200 (2 m, sold separately, daisy-chainable) |
| App | eWeLink (iOS & Android) |
| Certifications | CE · FCC |
| Warranty | 1 Year Manufacturer Warranty |
❓ Frequently Asked Questions
Does it need a hub?
How does the detection cable work?
Will it alert me if my WiFi is down?
Can it automatically shut off the water?
How long does the battery last?
Does it work with Home Assistant?
Can I use it on metal surfaces?
Is it waterproof?
🤝 Need Help? We’re Here for You!
Visit Us
8 Wildebraam Street
Weltevreden Park, Roodepoort
Gauteng, 1709
Detect Leaks Before They Become Floods
0.5 mm sensitivity. 5-year battery. Automatic alerts — even without WiFi.
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