Product Overview
Introduction
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Product Name |
SONOFF SNZB-02LD IP65 Zigbee LCD Smart Thermometer (Probe Version) |
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Product Model |
SNZB-02LD is a waterproof Zigbee smart temperature sensor. It detects the temperature of liquids or enclosed spaces through the probe, displaying real-time data on the LCD high-definition screen. When paired with a Zigbee gateway, users can monitor temperature changes via the app or set up smart scenes with other devices to achieve home automation.
Highlights
- 2.2″ LCD Screen Display: Easily monitor temperature on the clear LCD screen.
- Unique Waterproof Structure Design: SNZB-02LD is housed in an IP65-rated casing, ensuring reliable performance even in humid or splash - prone environments.
- Accurate Measurement: With ±0.5℃ accuracy for temperature, you can trust the stability and accuracy of real - time readings.
- IP65 Waterproof Rating: Ensures stable performance even in humid, splash-prone environments.
- Zigbee 3.0 Compatible: Supports Zigbee hubs using the Zigbee 3.0 protocol, like SONOFF iHost, NSPanel Pro, ZBBridge-P, ZBBridge-U, ZBDongle-E, ZBDongle-P.
Applications
- Detect the temperature of liquids in containers, such as water tanks, oil barrels, etc.
- Monitor the temperature in enclosed spaces, like refrigerators, incubators, and cabinets.
- Create smart scenes to turn on the cooling or heating equipment when the temperature exceeds the set threshold.
Specification
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Model |
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MCU |
TLSR8656F512ET32 |
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Input |
3V |
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Battery model |
CR2477 |
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Wireless connection |
Zigbee 3.0（IEEE802.15.4） |
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LCD dimension |
2.2" |
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Net weight |
86.2g（Includes cables） |
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Color |
White |
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Product dimension |
62.8x58.5x21.8mm |
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Casing material |
PC+ABS |
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IP rating |
IP65 |
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Host working temperature |
-10℃~60℃/14℉~140℉ |
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Host working humidity |
0~100%RH |
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Probe working temperature |
-40℃~115℃ |
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Cable length |
1.5m |
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Temperature tolerance |
±0.5℃/±0.9℉ |
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Working height |
Less than 2000m |
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Certification |
CE/FCC/ISED/RoHS |
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IC |
29127-SNZB02L |
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FCC ID |
2APN5SNZB02L |
Key Features
eWeLink Platform
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Notice: This functionality is available only when the device is paired with the eWeLink app. For capabilities when the device is paired via Matter with Alexa, Google Home, or other platforms, refer to Key Features >> Compatible Zigbee Hubs List |
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Device Home Page Functions |
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Key Features |
Feature Description |
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Current Temperature |
Real-time display on the device screen and in the eWeLink App. |
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Historical Chart |
Hourly logs; view by a day, 7 days, month, and half-year; supports CSV export. |
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Battery level |
The current battery level of the device. |
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Device Settings |
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Key Features |
Feature Description |
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Third-party Platforms |
Alexa |
Temp. query |
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Google Home |
Temp. query |
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SmartThings |
Temp. query; Battery Level query |
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IFTTT |
Temp. trigger |
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Temperature Unit |
Switch the temperature unit, and both the device display and the app will update accordingly:
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Calibration |
The temperature readings of the device can be adjusted for calibration. Calibratable range: |
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Report Configuration |
Adjust the Temp. reporting threshold or interval to change the data update frequency in the app. |
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Notice: The Third-party Platforms methods apply after adding the device to the eWeLink APP, linking accounts, and syncing the device to third-party platforms via cloud-to-cloud integration. This does not involve a direct connection to third-party gateways. |
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Smart Scene |
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Trigger Type |
Description |
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Temperature |
Trigger when the temp exceeds the threshold. |
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Device Offline |
Triggered when the device goes offline. |
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Execution Action |
Description |
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*SNZB-02LD does not support being the smart scene execution device |
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Compatible Zigbee Hubs List
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Platform |
eWeLink |
Home Assistant via ZHA |
Home Assistant via Z2M |
Alexa |
SmartThings |
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Zigbee Hub |
ZBBridge |
ZBBridge - P |
ZBDongle - P/-E |
ZBDongle - P/-E |
Amazon Echo (Plus 2nd, Echo 4th, Show 2nd) |
Samsung SmartThings Hub V3 / Aeotec V3 |
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Temperature |
√ |
√ |
√ |
√ |
√ |
√ |
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Temperature Calibration |
× |
√ |
√ |
√ |
× |
√ |
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Battery |
√ |
√ |
√ |
√ |
× |
√ |
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History Records |
√ |
√ |
√ |
√ |
× |
× |
|
OTA |
× |
√ |
√ |
√ |
× |
× |
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Scene |
√ |
√ |
√ |
√ |
√ |
√ |
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Notice:
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Installation and Configuration Guide
① Probe
② Signal icon
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Signal icon |
Description |
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Flashes slowly |
Device is in pairing mode. |
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Keeps on |
Pairing successful |
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Keeps off |
Pairing failed |
③ Lanyard hole
④ Battery
⑤ Current temperature
⑥ Button
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Button |
Description |
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Press & hold 5 seconds |
The device enters pairing mode and restores factory settings. |
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Double-press |
Switch temperature unit ℃/℉ (Factory default is ℃) |
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Single-press |
Detection communication distance |
Power On the Device
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Notice: If the device is not paired within 3 minutes, it will exit pairing mode. To re-enter pairing mode, use a card pin to press and hold the device button for 5 seconds until the signal icon |
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Use a coin to twist and remove the battery cover. |
Take out the battery insulation sheet to power on the device. |
Add Device
eWeLink Platform
Open eWeLink to scan the QR code on the Quick Guide or the device itself to add the device.
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Enter "Scan" |
Scan the QR code on the device |
Select "Add Device" |
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Long press the pairing button for 5 seconds |
The Signal icon flashes slowly for 180s |
Select Zigbee gateway |
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Wait until the addition is done |
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Compatible Third-party Platform
If you're using a third-party Zigbee gateway, please refer to the corresponding app for detailed instructions on how to add the device.
Usage
Fix the probe
Tear off the Velcro adhesive and fix the probe to the location where detection is required (for example: in the refrigerator, next to the swimming pool and so on).
Host placement
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Magnetic suction to the metal surface. |
Thread the lanyard through the device hole and hang the device. |
FAQ
- What type of battery does the SNZB-02LD use, and how long does it last?
The SNZB-02LD comes with a pre-installed CR2477 battery. Simply remove the insulation tab to activate it. The battery life depends on usage and report configuration settings. - How often does the SNZB-02LD update data in the app?
When the SNZB-02LD detects a temperature change exceeding the configured threshold, it will immediately update the data in the app. If no threshold is triggered, it will update at least once every hour. You can customize the thresholds and maximum reporting interval in the Report Configuration section of the eWeLink app. - Why is the data on the device screen different from what's shown in the app?
This could be due to a network delay, preventing the app from displaying the most recent data. Alternatively, if the temperature hasn't exceeded the reporting threshold, the app may not have refreshed with the latest data yet. - What level of protection does IP65 waterproofing provide?
The IP65 waterproof conditions are as follows:
① Using a standard 6.3mm inner diameter test nozzle with a flow rate of 12.5 liters per minute, water is sprayed onto the casing from all feasible directions.
② Actual water jet size: Approximately 40mm in diameter at a distance of 2.5 meters from the nozzle.
③ Each square meter of the casing's surface area may be sprayed for 1 minute, with a minimum test duration of 3 minutes. - Can the device be used outdoors?
The sensor has IP65 protection, resisting low-pressure water jets from any direction. It can be used in water-splashed or humid environments, including sheltered outdoor areas. For extreme weather (e.g., heavy rain, floods), additional protection or indoor storage is recommended.
Troubleshooting
- The Zigbee signal is unstable and the device frequently goes offline?
If your device often goes offline, it could be due to the long distance between the device and the gateway (we recommend no more than 50 meters through walls), or obstacles/interference blocking the signal. Try adjusting the placement of your device and gateway, or use additional Zigbee router devices to strengthen your Zigbee network coverage. - Missing features after pairing with the eWeLink app?
Please ensure both your Zigbee gateway and the eWeLink app are updated to the latest version. If the device was added using an outdated gateway firmware, remove the device, update the Zigbee gateway, and then re-add the device. - Device not working properly in low-temperature environments?
In environments approaching extremely low temperatures (e.g., -20℃ / -4℉), the device may encounter:
① Greater deviation in temperature readings (up to ±0.7℃ / ±1.3℉)
② Significant battery capacity drop
③ These effects will improve as the ambient temperature rises. However, please note that due to battery characteristics, the battery capacity may not fully recover.
Application Explore
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Aquarium Temperature Monitoring & Probe Cable Management |
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A 3D-printed SNZB-02LD bracket specially designed for the aquarium. It securely mounts to the edge of the tank, ensuring the probe stays at the proper depth and away from fish activity. The built-in cable slot keeps the probe wire neatly organized, preventing tangles and maintaining a clean, tidy appearance for your aquarium. |
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Access Link: Aquarium Temperature Monitoring & Probe Cable Management |
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SNZB-02LD 1:1 Scale Replica Model |
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This is a 1:1 scale replica model of the SONOFF SNZB-02LD smart temperature sensor / Smart Thermometer (Probe Version). The model accurately reproduces:
It’s designed to help users verify physical dimensions before purchasing or installing the actual sensor, and to support the development of custom accessories and mounts. The model does not include internal features, buttons, or LED indicators — it is a shell-only mockup purely for size and fit evaluation.
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Access Link: SNZB-02LD 1:1 Scale Replica Model |
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Know more
For a detailed guide and review of the SONOFF SNZB-02LD, visit our free course at the SONOFF Academy.