Sonoff THR320D Elite Smart Temperature and Humidity Monitoring Switch
Sonoff THR320D Elite Smart Temperature and Humidity Monitoring Switch
Sonoff THR320D Elite Smart Temperature and Humidity Monitoring Switch
The Sonoff THR320D Elite is a WiFi-enabled smart switch with integrated temperature and humidity sensors, designed for real-time environmental monitoring and automated control in residential and commercial applications. HVAC technicians, facility managers, and IoT integrators use this device to maintain precise climate control, trigger automated responses based on environmental thresholds, and remotely monitor conditions from any location. It solves the critical problem of manual climate monitoring and delayed response to temperature and humidity fluctuations, enabling predictive maintenance and energy-efficient automation.
Product Overview
The Sonoff THR320D Elite operates as a dual-function device combining a relay-controlled smart switch with real-time environmental sensing capabilities. The device connects to your home or office WiFi network and communicates with the eWeLink cloud platform, allowing you to monitor temperature and humidity readings with 0.1°C accuracy and control connected appliances remotely via smartphone or voice assistants. The integrated DHT22 sensor provides highly accurate environmental data, while the relay supports up to 16A load capacity, making it suitable for controlling air conditioning units, dehumidifiers, heaters, and ventilation systems. The device features a compact wall-mounted design with a local control button for manual override, ensuring functionality even during WiFi outages.
What distinguishes the THR320D Elite is its dual-threshold automation capability, allowing you to set independent trigger points for temperature and humidity levels. For example, you can configure the device to activate a dehumidifier when humidity exceeds 65% and simultaneously trigger a cooling fan when temperature surpasses 28°C. The device supports both local and cloud-based automation through the eWeLink app, enabling complex conditional logic and integration with other Sonoff devices through scenes and automations. Real-time data logging and historical analytics help identify environmental patterns, optimize energy consumption, and maintain equipment efficiency.
Key Specifications
| Specification | Details |
| Product Type | WiFi Smart Switch with Temperature and Humidity Sensor |
| Brand | Sonoff (ITEAD) |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
| WiFi Standard | 802.11 b/g/n (2.4 GHz) |
| Temperature Sensor Range | -10°C to 60°C with 0.1°C accuracy |
| Humidity Sensor Range | 0% to 100% RH with 3% accuracy |
| Relay Capacity | 16A at 250V AC (3680W maximum) |
| Operating Voltage | 100-240V AC, 50/60 Hz |
| Dimensions | 86mm x 86mm x 45mm (standard wall switch size) |
Key Features
- Dual Environmental Sensors: Integrated DHT22 temperature and humidity sensors provide real-time monitoring with 0.1°C temperature accuracy and 3% humidity accuracy for precise climate control
- 16A Relay Switching: High-capacity relay supports up to 3680W load capacity, enabling control of air conditioning units, heaters, dehumidifiers, and industrial ventilation equipment
- Dual-Threshold Automation: Set independent temperature and humidity trigger points to activate multiple appliances based on environmental conditions, eliminating manual intervention
- Remote Control via eWeLink App: Monitor real-time environmental data and control the switch from anywhere using iOS or Android app with push notifications for threshold breaches
- Voice Assistant Integration: Compatible with Amazon Alexa and Google Home for voice-controlled switching and environmental monitoring queries
- Local Control Override: Physical button on device allows manual operation during WiFi outages or emergency situations
- Scene and Automation Support: Create complex automation rules linking temperature/humidity conditions to multiple Sonoff devices for coordinated smart home responses
- Data Logging and Analytics: Historical environmental data tracking helps identify patterns and optimize energy consumption for HVAC systems
Applications and Use Cases
- Residential Climate Control: Automatically activate air conditioning when temperature exceeds 30°C and humidity rises above 70%, maintaining comfort while reducing energy waste in bedrooms and living spaces
- Server Room and Data Center Management: Monitor critical environmental conditions continuously and trigger cooling systems when temperature approaches maximum safe operating limits, preventing equipment failure and data loss
- Greenhouse and Hydroponics Automation: Control ventilation fans and misters based on precise humidity and temperature thresholds to maintain optimal growing conditions for plants and crops
- Pharmaceutical and Laboratory Storage: Maintain strict environmental compliance by monitoring temperature and humidity in medicine storage areas, triggering alerts when conditions deviate from required ranges
- Warehouse and Logistics Facilities: Prevent product degradation by automatically controlling dehumidifiers and ventilation systems when ambient humidity exceeds storage requirements for sensitive goods
- Hotel and Hospitality Room Management: Implement guest comfort automation that adjusts room temperature and humidity based on occupancy and time of day, reducing operational costs
How to Use
Installation of the Sonoff THR320D Elite requires basic electrical knowledge. Turn off power at the circuit breaker before beginning work. The device has three terminals: Live (L), Neutral (N), and Load (Lo). Connect your power supply to the L and N terminals, then connect the appliance you wish to control (air conditioner, heater, dehumidifier) to the Load terminal. Secure the device in a standard 86mm wall switch box and restore power. The device will boot up within 10 seconds, indicated by a brief LED flash.
Download the eWeLink app on your smartphone and create an account if you don't have one. Open the app, tap the plus icon to add a new device, select Sonoff THR320D Elite from the product list, and follow the pairing wizard. You'll be prompted to scan the QR code on the device or enter the device ID manually. Once connected to your WiFi network, the app will display real-time temperature and humidity readings. Configure automation rules by navigating to the device settings: set temperature thresholds (e.g., turn on AC when temperature exceeds 28°C), humidity thresholds (e.g., activate dehumidifier at 65% RH), and choose whether these automations run locally or through the cloud. Test your automation by manually adjusting room temperature or humidity to verify the switch activates correctly.
Frequently Asked Questions
What is the difference between local and cloud automation on the THR320D Elite?
Local automation runs directly on the device using its internal logic processor, requiring no internet connection and providing instant response times of under 1 second. Cloud automation processes rules through Sonoff servers, enabling more complex conditional logic and cross-device integration but requiring active WiFi connection. For critical applications like server room cooling, use local automation for reliability. For convenience features like guest comfort, cloud automation with notifications works well.
Can I use the THR320D Elite to control multiple appliances simultaneously?
The THR320D Elite has a single relay output, so it can directly control only one appliance at a time. However, you can create scenes in the eWeLink app that trigger multiple Sonoff devices based on the temperature and humidity readings from the THR320D Elite. For example, when the THR320D Elite detects temperature above 30°C, a scene can activate both an air conditioner (via another Sonoff switch) and a ventilation fan simultaneously.
What happens to automation if my WiFi connection drops?
Local automations continue to function normally since they run on the device's internal processor without requiring internet. Cloud-based automations will pause until WiFi reconnects. The device automatically reconnects to WiFi within 30-60 seconds of network availability. For critical applications, configure all automations as local rules to ensure continuous operation during internet outages.
Is the THR320D Elite compatible with 3-phase industrial systems?
No, the THR320D Elite is designed for single-phase AC systems operating at 100-240V. For industrial 3-phase applications, consult with a qualified electrician about using industrial-grade smart relays. The device's 16A capacity also makes it unsuitable for high-power industrial loads exceeding 3680W.
How accurate are the temperature and humidity readings?
The integrated DHT22 sensor provides temperature accuracy of ±0.5°C (displayed as 0.1°C increments) and humidity accuracy of ±3% RH. For applications requiring higher precision, you can pair the device with external industrial-grade sensors connected via additional Sonoff TH10/TH16 devices with probe sensors, then cross-reference readings in the eWeLink app.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Tech Depot
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- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
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- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
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