SONOFF Zigbee Water Leak Sensor | SNZB-05P
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【Leak & Drip Detection】The elevated probe design detects liquid levels as low as 0.5mm and works reliably on metal surfaces without false triggers. Its concave water collection design quickly senses drips and stops leaks at the source.
【Extended Detection Capability】Supports connection with water leak detection cables (sold separately or as part of sensor kits). Whether covering a wide area or a narrow spot, water leaks are detected accurately. Extension cables can be connected in series without length limitation.
【Real-time Alerts & Multiple Notifications】Working as a home water leak detector, SNZB-05P will instantly push app notifications to alert you once water is detected, and Zigbee local control scenes can trigger gateway alarms even during WiFi outages.
【Zigbee 3.0 Compatible】Compatible with Zigbee 3.0 hubs such as SONOFF NSPanel Pro, SONOFF iHost, ZB Bridge variants (ZB Bridge, ZB Bridge-P, ZB Bridge-U), and SmartThings Hub V3.
【Home Assistant Support】Easily integrates with Home Assistant via ZHA or Zigbee2MQTT (requires Zigbee dongle like SONOFF ZBDongle-P or ZBDongle-E) for seamless home automation.
Technical details, troubleshooting or setup tips? Access the SNZB-05P knowledge center for all the info you need.
SONOFF Zigbee Water Leak Sensor | SNZB-05P
Various Unexpected Leaks May Cause the House to Be Flooded
SONOFF SNZB-05P: Smart Protection Against Unexpected Water Leaks
Flexible Water Leak Detection for Different Home Scenarios
Leaking Detection
The elevated probe design can detect a 0.5mm liquid level and allows for use on metal surfaces without false triggers from the metal.
Dripping Detection
Concave water collection design detects drips and stops leaks at the source.
Extension Cable Detection
Wide-range detection or narrow-area inspection, leaving no water leaks undetected.
Leaking Detection
The elevated probe design can detect a 0.5mm liquid level and allows for use on metal surfaces without false triggers from the metal.
Dripping Detection
Concave water collection design detects drips and stops leaks at the source.
Extension Cable Detection
Wide-range detection or narrow-area inspection, leaving no water leaks undetected.
Striving for Details, Creating Exceptional Quality
Built with meticulous attention to detail, the SNZB-05P delivers durable performance and precise detection to safeguard your home from water damage.
Equipped With Gold-Plated Probes for Enhanced Corrosion Resistance
Made From UV-Resistant
Materials to Prevent
Discoloration Over Time
Extended Battery Life
Using CR2477 battery extends the battery life to over 5 years,
eliminating concerns about frequent battery replacements.
Multiple Notifications
App Push Notification
Scene trigger Zigbee hub sound alarm
Scene trigger Zigbee hub sound alarm
*Need to subscribe to eWeLink Advanced plan.
Redundant Alarm Settings to Prevent Missed Alerts
The SNZB-05P continuously monitors for leaks. It sends updates every 10 minutes while a leak persists, ensuring you never miss an alert even if WiFi is unstable.
Local Control for Reliable Alarms - even Without Wi-Fi
The SNZB-05P triggers alarms via the Zigbee gateway and app notifications, while local scenes keep your home protected even if WiFi is down.
Multiple Alert Methods for Reliable Notification
Redundant Alarm Settings support multiple alert methods, including local Zigbee gateway alarms, app notifications, and third-party platforms such as email and SMS via IFTTT, keeping you informed of leaks anytime.
Works with Apple Home Via Matter Bridge
All solutions integrate the SONOFF SNZB-05P into your Apple ecosystem via Matter Bridge, enabling seamless interconnected device control.
Learn More about ZBBridge-U | Learn More about eWeLink CUBE
Supported Zigbee Hubs
Compatible with Home Assistant
The SNZB-05P works with Home Assistant through ZHA or Zigbee2MQTT, allowing you to trigger automated actions for home protection.
Feature Overview
What’s in the Box
Specs & User Manual
SONOFF SNZB-05P is a Zigbee 3.0 water leak sensor with low power consumption and a long 5-year battery life. It features an elevated probe that detects liquid levels as low as 0.5 mm, while the concave collection design enables fast drip sensing. SONOFF water leak detector supports extended detection cable networks with no length limit, and delivers instant app alerts alongside local Zigbee scene-triggered alarms—even if Wi-Fi is down. Acting as a home water leak detector, it is suitable for sink cabinets, sump pumps, laundry rooms, bathrooms, basements, wine cellars, kitchen, attic, water heaters, and more. Compatible with SONOFF NSPanel Pro, iHost, ZB Bridge series, and Home Assistant (via ZHA or Zigbee2MQTT), it provides reliable, scalable water leak protection.
User Manual (PDF)SNZB-05P
CR2477
PC+ABS
Zigbee 3.0
-10℃~60℃
0-100%RH
130m (Open space)
48x48x21.6mm
FAQ
1. How does the SONOFF SNZB-05P water leak sensor work？
The SONOFF SNZB-05P water leak detector senses leaks with its elevated probe and concave water collection design, detecting even small drips quickly. Once water completes the circuit between the probes, it sends instant alerts via the Zigbee gateway, triggering sound alarms and an instant app notification for reliable home protection.
2. Where should I place my SNZB-05P water leak sensor?
The SONOFF water leak detector is designed for residential use and can be placed anywhere water leaks are likely to occur — such as near water heaters, washing machines, sump pumps, under sinks, or in basements. Its compact design also makes it ideal for tight or hidden spaces like under cabinets, around pipes, or in wine cellars and attics. For larger or hard-to-reach areas, such as basements or attics, you can use water detection cables to extend the monitoring range.
This helps early detection of drips, leaks, and potential flooding, protecting your home from water damage.
3. Is the SNZB-05P Zigbee water leak sensor compatible with Home Assistant?
Yes. The SONOFF water leak detector supports Home Assistant via ZHA or Zigbee2MQTT. To use this integration, you will need a Zigbee dongle such as the SONOFF ZBDongle-P or ZBDongle-E.
4. Is the SONOFF SNZB-05P water leak sensor waterproof and dustproof?
Yes. With an IP67-rated design, the SONOFF water leak sensor is built to withstand dust and temporary water immersion, ensuring stable operation in damp or leak-prone areas.
5. What water level triggers the SONOFF SNZB-05P water leak sensor alarm?
The SONOFF water leak sensor is highly sensitive and can trigger an alarm when it detects liquid levels as low as 0.5mm.
6. Does the SNZB-05P Zigbee water leak sensor support SmartThings?
Yes. You can connect the SONOFF Zigbee water leak sensor to a Samsung SmartThings/Aeotec gateway. Please refer to the guide and driver installation link here: https://sonoff.tech/blogs/news/sonoff-products-integration-guide-for-smartthings-driver-installation
If you have a SONOFF gateway, you can also use the Cloud-to-Cloud integration method with the SmartThings app. Full instructions are available at: https://ewelink.cc/ewelink-works-with-smartthings/
7. Will I miss water leak alerts if my network is unstable?
No. With firmware V1.0.2 or later, the sensor resends leak alerts every 10 minutes while water is detected, helping prevent missed notifications caused by temporary network issues.
8. Can I use extended water detection cables with the SONOFF SNZB-05P water leak sensor?
Yes. You can connect multiple water detection cables in a daisy chain with no total length limit, allowing coverage for large areas.
9. How does the SNZB-05P water leak detection cable work？
- The water leak detection cable is a braided extension that attaches to the sensor via a magnetic clip. It is designed to trigger the alarm whenever moisture touches any part of the cable, making it ideal for winding around appliances like washing machines, basements, and water heaters.
- These cables can be connected in series without any length limitation, allowing for wide-area coverage. Once the cable has been soaked, it can be reused after being completely dry.
10. Can I reuse the water detection sensor cable?
Yes, after being exposed to water, the cable can be reused once it is completely dry. Please do not pull, twist, or handle the extension cable roughly, as this may cause damage.
11. What is the recommended humidity range for using the water leak detection cable?
The recommended operating humidity is 0–80% RH (non-condensing). Excessive humidity may cause the sensor to falsely detect water.
12. Can I use a standard Type-C extension cable between two water detection cables?
Yes, you can. However, please do not use a previously soaked Type-C extension cable to charge other devices.
13. Why does the app still show the water sensor as online even after the battery is removed?
- The SONOFF water leak sensor communicates with the gateway periodically to maintain its online status. If the gateway doesn't receive communication after a certain period, it will mark the device as offline.
- As a battery-powered water leak detector, it uses low-frequency communication to conserve power. For example, when connected to a SONOFF ZBBridge-P gateway, the device will be marked offline about 1 hour after the battery is removed. With other gateways, it may take several hours or more.
- If the water sensor is in normal use with good signal strength, you will receive a low battery warning before the battery runs out, so there's no need to worry.