Sonoff SNZB-02B Smart Temperature and Humidity Sensor – Zigbee 3.0 Protocol, Accurate Measurement, Threshold Exceeded Alerts, Compatible with eWeLink and Home Assistant

Description

The Sonoff SNZB-02B is the ideal solution for maintaining an optimal microclimate in your home, office or storage areas. Thanks to its built-in high-precision Swiss sensor, the device quickly detects even the slightest fluctuations in temperature and humidity, providing accurate real-time data.

Operating on the Zigbee 3.0 protocol, the sensor ensures minimal energy consumption, negligible latency when executing local automations and excellent network stability. It is an essential device for optimising energy consumption, enabling air-conditioning units to be switched on or off automatically only when necessary.

Key Features & Technical Advantages

• High-Precision Measurement: Equipped with an industrial-grade internal sensor, it offers high accuracy in temperature (±0.2°C) and humidity (±2% RH) readings.

• Notifications and Alerts When Thresholds Are Exceeded: You can set minimum and maximum temperature or humidity thresholds in the app. As soon as the values exceed the set limits, you’ll instantly receive a push notification on your phone.

• Consumption History and Charts: Allows you to view and export historical data (by day, month or year), helping you to analyse changes in your indoor climate and the efficiency of your home’s insulation.

• Zigbee 3.0 Connectivity: Ensures fast communication with the local gateway, operating independently of an internet connection to execute predefined local routines.

• Low Power Consumption & Long-Lasting Battery: Runs on a CR2450 battery, offering long-lasting battery life and automatic alerts on your phone when the battery level is low.

• Simple and Flexible Installation: Its compact size and the included 3M adhesive pad allow for easy mounting on a wall or furniture, or placing it directly on a desk.

Usage Modes and Scenarios

1. Heating/Air Conditioning Automation: Set up a routine whereby a Sonoff smart relay (e.g. Sonoff ZBMINI) switches on an electric heater or central heating system when the room temperature drops below 20°C.

2. Humidity Control in the Bathroom or Basement: Set the extractor fan or a dehumidifier to switch on automatically when the humidity level exceeds 65% RH, preventing damp from forming.

3. Plant Protection in Greenhouses or Solar Greenhouses: Continuously monitors environmental parameters and sends an alert to your phone if the temperature drops dangerously low on winter or spring nights.

Technical Specifications

• Brand / Model: SONOFF SNZB-02B

• Sensor Type: Temperature and humidity sensor

• Wireless Protocol: Zigbee 3.0 (IEEE 802.15.4)

• Temperature Measurement Range: -10°C ... +60°C (Accuracy: ±0.2°C)

• Humidity Measurement Range: 0% ... 99% RH (Accuracy: ±2% RH)

• Power supply: 1 × CR2450 battery (3V)

• Housing Material: Flame-retardant PC (White)

• Mounting: 3M double-sided adhesive tape (included)

• Control App: eWeLink (iOS / Android)

• Ecosystem Compatibility: Sonoff iHost, NSPanel Pro, ZB Bridge-P/U, Home Assistant (ZHA / Zigbee2MQTT), SmartThings, Amazon Alexa, Google Home.

Package Contents

• 1 × Sonoff SNZB-02B temperature and humidity sensor

• 1 × CR2450 battery (pre-installed/included)

• 1 × 3M double-sided adhesive tape

• 1 × User manual and eWeLink / Zigbee setup guide

(Note: A compatible Zigbee 3.0 Hub/Gateway is required for connection and remote access).