SONOFF TH Elite Smart Temperature and Humidity Monitoring Switch 20A – THR320D

The SONOFF THR320D Smart Wi-Fi Temperature & Humidity Monitoring Switch is the upgraded high-power version of SONOFF's intelligent environmental control switches, designed for advanced automation and reliable control of demanding electrical appliances . With its powerful 20A rated current and impressive 4800W maximum load , the THR320D can directly manage heavy-duty equipment such as industrial heaters, large air conditioners, water heaters, irrigation pumps, and commercial machinery . A standout feature of the THR320D is its built-in LCD display , which shows real-time temperature and humidity readings , current operating status, and sensor data directly on the device. This on-device visual feedback makes it convenient to monitor environmental conditions at a glance without needing to open the app — perfect for installations in workshops, greenhouses, or any location where instant local information is valuable. The THR320D works seamlessly with SONOFF TH sensor probes to continuously track environmental conditions. Using the free eWeLink app (available for Android and iOS ), users can configure temperature- and humidity-based smart scenes that automatically activate or deactivate connected devices when conditions cross defined thresholds — ideal for maintaining the perfect climate in greenhouses, incubators, mushroom farms, aquariums, and server rooms . The device fully integrates with leading voice assistants — Amazon Alexa and Google Assistant — for hands-free voice control. Additional smart functions include scheduling, countdown timers, remote operation, automation notifications , and historical data charts for long-term trend analysis. Engineered with an industrial-style durable build and made from fire-resistant PC V0 material , the THR320D includes enhanced safety protections against overheating, overload, and short circuits. Its inline installation design makes it easy to integrate into existing electrical lines for both new and retrofit projects, making it suitable for homes, farms, agriculture, commercial facilities, and industrial automation systems . Technical Specifications Specification Details Product Model SONOFF THR320D Product Type Smart Temperature & Humidity Monitoring Switch Rated Current 20A Max Load 4800W Display Type LCD Display (built-in) Input Voltage 100–240V AC, 50/60Hz Connectivity Wi-Fi IEEE 802.11 b/g/n 2.4GHz App Support eWeLink App Sensor Support SONOFF TH Sensors Temperature Monitoring Supported Humidity Monitoring Supported Smart Automation Supported Remote Control Supported Scheduling & Timers Supported Voice Assistants Amazon Alexa, Google Assistant Installation Type Inline Smart Switch Material PC V0 (fire-resistant) Color White Operating Systems Android & iOS Applications Smart home climate control and high-power appliance automation Electric water heaters and boilers control Large air conditioners and HVAC systems Industrial heaters and process equipment Greenhouse temperature and humidity regulation Mushroom farms and controlled-environment agriculture Aquariums, reptile terrariums, and vivariums Poultry farms and incubators for eggs and chicks Server rooms and data centers for thermal monitoring Wine cellars and food storage climate control Workshops and laboratories with sensitive equipment Commercial laundry and drying equipment Underfloor heating and radiant systems Irrigation pumps and water management in agriculture Industrial automation projects requiring environmental monitoring Pet care facilities (kennels, aviaries, terrariums) Why Choose This Product Powerful 20A high-load smart control Built-in LCD screen for live monitoring Real-time temperature and humidity tracking Supports automation based on environmental conditions Compatible with SONOFF TH sensors Remote control through the eWeLink app Supports schedules, timers, and smart scenes Voice control with Alexa and Google Assistant Ideal for greenhouses, HVAC, aquariums, and industrial automation Reliable smart environmental control solution