◆ Zigbee 3.0 Smart Temperature Sensor with LCD Display and Probe — this unit is not a motion or motion-light sensor. It’s a thermometer sensor designed for smart climate monitoring with an external probe for measuring temperatures in hard-to-reach or harsh environments.
???? Key Verified Features
✔ Zigbee 3.0 Connectivity
Connects to compatible Zigbee hubs (Sonoff ZBBridge, iHost, ZBDongle, NSPanel Pro, etc.) for smart readings and automations.
✔ External Stainless-Steel Probe (1.5 m)
Allows temperature measurement in liquids, tanks, refrigerators, freezers, pools, and other enclosed or tough spaces.
✔ 2.2″ LCD Screen
Shows real-time temperature readings directly on the device without needing a phone.
✔ IP65 Water & Dust Resistance
Safe for splash-prone and humid environments — ideal for bathrooms, outdoors, or kitchens.
✔ Long Battery Life (CR2477)
Operates on a replaceable CR2477 battery with up to ~2 years of typical life.
???? Verified Technical Specifications
| Specification | Verified Detail |
|---|
| Model | Sonoff SNZB-02LD |
| Wireless Protocol | Zigbee 3.0 (IEEE 802.15.4) |
| Sensor Type | Temperature with external probe |
| Temperature Measurement Range | Approximately –40 °C to +115 °C (probe) |
| Display | 2.2″ LCD temperature display |
| Battery | 1 × CR2477 (3 V) |
| IP Rating | IP65 (dust/water resistance) |
| Housing Material | PC + ABS (weather-resistant) |
| Button | Pair/reset button (under battery cover) |
| Compatibility | eWeLink app via Zigbee hub; works with some Zigbee platforms |
| App Automation | Yes — temperature triggers and alerts |
| Battery Life | Up to ~2 years typical |
| Probe Length | Approx. 1.5 m stainless-steel cable |
Sources:
???? What It Is & Is Not
✅ It IS
• A Zigbee temperature sensor with LCD and external probe
• A device for real-time and app-based temperature monitoring
• Capable of automations based on temperature thresholds
❌ It IS NOT
• A motion detector
• A light or presence sensor
• A humidity sensor (this model itself measures temperature only — not humidity)
???? How It Works in Smart Home
• Pair the SNZB-02LD with a Zigbee hub/coordinator (e.g., Sonoff ZBBridge, iHost, ZBDongle series).
• Use the eWeLink app to view temperature readings remotely, set alerts, and trigger automations (e.g., turn on a heater if temperature drops below threshold).
• The probe allows accurate temperature sampling in liquids or internal spaces where the main unit cannot reach.
???? Typical Use Cases
✔ Monitoring water tank temperature
✔ Checking refrigerator/freezer environment
✔ Greenhouse / gardening temperature data
✔ Outdoor or humid area temperature tracking
✔ Aquariums and pet habitats
