Liquid leak detector Sonoff SNZB-05P, battery-powered, IP67, plastic housing, 48×48×21.6 mm, 60-month battery life

Sonoff SNZB-05P is a battery-powered liquid leak detector with IP67 protection and a compact plastic housing (48×48×21.6 mm). The sensor uses an elevated probe and concave water collection design to detect liquid levels from 0.5 mm and sense drips quickly. With an estimated 60‑month battery life and Zigbee 3.0 compatibility, this detector is intended for long-term monitoring near pipes, water heaters, basements and other areas at risk of water ingress. It supports connection of water leak detection cables for extended coverage, provides real-time app push notifications, and can trigger local Zigbee scenes to generate alarms even if Wi‑Fi is unavailable.

Advantages

The elevated probe minimizes false triggers on metal surfaces while enabling very low-level liquid detection down to 0.5 mm. IP67 protection ensures reliable operation in damp or dusty conditions. Long battery life (up to 60 months under typical conditions) reduces maintenance frequency. Support for external water detection cables allows flexible area coverage, and compatibility with Zigbee 3.0 hubs plus Home Assistant integration options (ZHA or Zigbee2MQTT) enables integration into existing smart home systems. Instant push notifications and local Zigbee scene triggers provide redundant alerting paths.

Suitable for

• Monitoring around water heaters and boilers
• Placement near supply pipes and joints prone to leaks
• Basement, laundry room or utility spaces
• Small commercial spaces or server cabinets where early leak detection is required

Key specifications

• Protection class: IP67 (dust-tight and protected against temporary immersion)
• Power supply: battery-powered with up to 60 months estimated life
• Housing material: plastic
• Dimensions: 48 × 48 × 21.6 mm
• Minimum detectable liquid level: 0.5 mm (elevated probe design)
• Extendable detection: supports connection of water leak detection cables; cables can be connected in series
• Wireless protocol: Zigbee 3.0 compatible
• Integration: works with Zigbee 3.0 hubs and Home Assistant via ZHA or Zigbee2MQTT (requires Zigbee dongle)
• Notifications: app push alerts and local Zigbee scene alarm triggers

How to use

Mount the Sonoff SNZB-05P on a flat surface near the area to be monitored, such as next to pipes, water heaters or in basements, ensuring the elevated probe and concave collection area are positioned where leaks or drips will contact the sensor. Pair the device with a compatible Zigbee 3.0 hub following the hub manufacturer’s pairing procedure. If wider coverage is required, connect a compatible water leak detection cable to the sensor and route it across the monitored zone; multiple cables can be connected in series. Configure notifications and local scenes in the gateway or Home Assistant to receive instant alerts when liquid is detected.

Recommendations

Place the detector where leak flow is likely to reach the probe quickly and avoid mounting it in locations where the sensor may be constantly submerged. For linear coverage, install detection cable along vulnerable seams and joints; test the system after installation to confirm alerts and scene triggers are functioning. Replace batteries according to hub battery reporting or at intervals aligned with environmental conditions to maintain the estimated 60‑month lifespan.