Introduction
SONOFF’s latest additions, the SNZB-02WD (Temperature & Humidity) and SNZB-02LD (Waterproof Thermometer), extend the capabilities of their Zigbee sensor lineup with IP65-rated durability and specialized probes. While the SNZB-02WD offers combined temp/humidity monitoring in outdoor or humid environments, the SNZB-02LD brings a waterproof probe for liquid or enclosed-space measurements. In contrast, the earlier SNZB-02D provides a large 2.5″ LCD display for indoor comfort monitoring, and the SNZB-02P focuses on long-life, low-power temperature & humidity sensing. Below, we break down their core features, ideal use cases, and present a side-by-side spec comparison of all four models.
New Models Overview
SNZB-02WD – Zigbee LCD Smart Temperature & Humidity Sensor
- IP65 Waterproof Rating: Protected against dust and low-pressure water jets, ideal for outdoor gardens, greenhouses, windowsills, or bathrooms
- 2.2″ LCD Display: Real-time temp/humidity readings with UV-resistant screen
- Temp & Humidity Range: -20°C~60°C (±0.2 °C); 0~100%RH (±2 % RH)
- Zigbee 3.0 Connectivity: Integrates with SONOFF gateways, Echo hubs, Home Assistant, Zigbee2MQTT
- Two Mounting Options: Magnetic, hanging rope
- Battery & Logging: CR2477 battery (~2 years); 6 months of historical data in eWeLink
SNZB-02LD – Zigbee LCD Smart Thermometer (with Waterproof Probe)
- Waterproof Probe (1.5 m): Monitor liquid temps in pools, aquariums, fermenters, or fridges
- 2.2″ LCD Display: Clear temperature readings
- Temp Range & Accuracy: Host: -10°C~60°C, 0~100%RH; Probe: -40°C~115°C
- IP65 Waterproof Rating: Safe for humid or misty environments
- Two Mounting Options: Magnetic, hanging rope
- Zigbee 3.0 & Battery: Same connectivity and CR2477 battery as SNZB-02WD
Earlier Models Recap
SNZB-02D – Zigbee LCD Smart Temperature & Humidity Sensor
- 2.5″ Large LCD: Bold digits for indoor monitoring
- Temp & Humidity Range: –10-60 °C (±0.2 °C); 5–95 % RH (±2 % RH)
- Reporting Interval: Every 5 s
- Three Mounting Options: Stand, magnetic, or 3M adhesive
- Battery Life: CR2450, ~2 years
SNZB-02P – Zigbee Temperature & Humidity Sensor
- Low-Power Design: Extended battery life (up to 4 years)
- Basic LED & Button UI: No display
- Temp & Humidity Range: –10-60 °C (±0.2 °C), 5%-95%RH (±2 % RH)
- Mounting: Adhesive or screw mount
- Reporting Interval: Every 5 s
Ideal Applications
- Outdoor & Humid Spaces → SNZB-02WD: Weatherproof monitoring with humidity insights.
- Liquid or Enclosed Monitoring → SNZB-02LD: Probe for pools, aquariums, or kitchen fridges.
- Indoor Comfort & Visual Readout → SNZB-02D: Large display for living rooms, bedrooms, nurseries, wine cellar, reptile terrarium, etc.
- Long-Life, Hidden Monitoring → SNZB-02P: Behind cabinets, utility rooms, humidor, incubator or areas where display isn’t needed.
Detailed Specification Comparison Table
|
Feature |
||||
|
Display |
2.2″ LCD |
2.2″ LCD |
2.5″ LCD |
None |
|
Measurements |
Temp & Humidity |
Temp Only |
Temp & Humidity |
Temp & Humidity |
|
Probe |
× |
Waterproof External (1.5 m) |
× |
× |
|
Temp Range |
–20~60 °C |
Host: -10°C~60°C, Probe: -40°C~115°C |
–10~60 °C |
–10~60 °C |
|
Humidity Range |
0–100 % RH |
Host: 0~100%RH |
5–95 % RH |
5–95% RH |
|
Accuracy (Temp/Humid) |
±0.2 °C / ±2 % RH |
±0.5 °C / — |
±0.2 °C / ±2 % RH |
±0.2 °C / ±2 % RH |
|
IP Rating |
IP65 |
IP65 |
— |
— |
|
Battery |
CR2477 (~2 yrs) |
CR2477 (~2 yrs) |
CR2450 (~2 yrs) |
CR2477 (~4 yrs) |
|
Connectivity |
Zigbee 3.0 |
Zigbee 3.0 |
Zigbee 3.0 |
Zigbee 3.0 |
|
Historical Data Logging |
6 months (eWeLink) |
6 months (eWeLink) |
6 months (eWeLink) |
6 months (eWeLink) |
|
Mounting Options |
Magnetic / Hanging Rope |
Magnetic / Hanging Rope |
Table / Magnet / Adhesive |
Adhesive / Screw |
|
Price |
How to Choose
● Home and Office:
○ For users who value cost-efficiency and hidden areas monitoring, the SNZB-02P is an ideal choice.
○ Those who need real-time data display can opt for the SNZB-02D, which provides a clear view of environmental conditions.
● Moist or Outdoor Environments:
○ In settings like greenhouses, kitchens, or outdoor areas where moisture is prevalent, the SNZB-02WD offers the necessary waterproofing and durability to ensure accurate monitoring even in harsh conditions.
● Specialized Applications:
○ When it comes to monitoring in refrigerators, bathtubs, or swimming pools, the SNZB-02LD shines with its remote sensing capabilities, ensuring precise temperature readings in challenging locations.
Conclusion
Each SONOFF Zigbee sensor brings unique strengths. Choose SNZB-02WD for outdoor humidity-aware monitoring, SNZB-02LD for liquid or probe-based measurements, SNZB-02D for a large indoor display, and SNZB-02P for ultra-long battery life in discreet installations. All models leverage Zigbee 3.0 for reliable local control via eWeLink, Home Assistant, or other compatible hubs—empowering you to build the perfect smart environment tailored to your needs.
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