Sonoff Airguard TH Lite Temperature Humidity Sensor

Sonoff Airguard TH Lite Temperature Humidity Sensor Product Description

Monitor tight, sensitive spaces seamlessly using the SONOFF AirGuard TH Lite Temperature Humidity Sensor (SNZB-02B). Engineered as a compact, display-free alternative to the standard model, this ultra-slim smart sensor focuses entirely on efficient remote monitoring and deeper environmental analysis. Driven by a professional-grade Swiss sensor, it tracks climate data with high accuracy of ±0.2°C for temperature and ±2% RH for humidity, refreshing every 5 seconds to provide instantaneous real-time reporting to your smart home ecosystem.
The AirGuard TH Lite goes beyond basic tracking by automatically calculating Vapour Pressure Deficit (VPD) and Dew Point metrics within the app—making it an invaluable tool for plant growth management, greenhouse cultivation, and mould prevention. Its screenless, optimised hardware setup allows the device to extract up to 2 years of battery life from two standard, toollessly replaced AAA batteries. Whether slipped into a guitar case, hidden in an attic, or tucked away inside an industrial server rack, this miniature powerhouse gives you the data stability needed to trigger smart climate automation scenes at a fraction of the physical footprint.

Key Product Features

• Ultra-Compact Design: Low-profile casing slips effortlessly into restricted areas like storage cabinets, terrariums, and safes.
• Swiss Sensor Precision: Accurate down to ±0.2°C and ±2% RH with a rapid 5-second data refresh cycle.
• Advanced Climate Metrics: Natively tracks Dew Point and VPD data to help monitor plant transpiration and condensation thresholds.
• 2-Year Battery Lifespan: Runs for up to 24 months on standard, easy-to-source AAA batteries without needing constant replacement.
• Smart Scenario Triggering: Set customised threshold notifications to automate external Zigbee-linked fans, heaters, and dehumidifiers.

Installation

Just fix it to a wall or leave freestanding, we have already configured it for your smart home server. Ask us to add automations for your preferences.