Sonoff SNZB-02LD Zigbee 3.0 LCD Temperature Sensor with External Probe

With an internal sensor accurate to ±0.2°C and a 1.5-metre external probe that reaches into fridges, planters or incubators, the SONOFF SNZB-02LD puts professional-grade temperature and humidity monitoring in the palm of your hand. The built-in LCD screen shows current values at a glance, while Zigbee 3.0 connectivity ensures reliable integration with your smart home.

Overview

The SNZB-02LD is a compact, wall-mountable sensor that measures temperature and humidity both locally and via its included probe. It connects to any Zigbee 3.0 gateway – such as the SONOFF Zigbee Bridge Pro – and can be monitored remotely through the eWeLink app. With a wide measurement range for the internal sensor (-9.9°C to 60°C) and an even broader one for the probe (-40°C to 80°C), this device is suitable for everyday room monitoring as well as specialised tasks like checking soil temperature or HVAC performance.

What stands out

• Large LCD display with Celsius/Fahrenheit switching – read current values directly on the device.
• External 1.5m probe with ±0.5°C accuracy for remote sensing.
• Zigbee 3.0 protocol ensures low-latency, low-power communication with your smart hub.
• Long battery life – up to one year on a single CR2450 coin cell.
• Compact design (PC plastic) fits any decor and can be mounted with adhesive pad or screws.

Technical details

• Connectivity: Zigbee 3.0 (IEEE 802.15.4), compatible with SONOFF Zigbee Bridge Pro
• Internal sensor range: -9.9°C to 60°C (14.2°F to 140°F)
• External probe range: -40°C to 80°C (-40°F to 176°F)
• Humidity range: 0% to 99% RH (non-condensing)
• Accuracy: ±0.2°C (internal), ±0.5°C (probe), ±3% RH
• Display: LCD, switchable °C/°F
• Power: 1× CR2450 3V lithium battery (included)
• Estimated battery life: up to 1 year
• Material: PC (polycarbonate)
• Mounting: wall-mounted via adhesive pad or screws

Our verdict

The SONOFF SNZB-02LD delivers exceptional value for anyone who needs accurate, remote temperature and humidity monitoring. Its combination of an LCD readout, an external probe, and Zigbee 3.0 integration makes it a versatile choice for smart home enthusiasts and professionals alike.