🌡️ SONOFF TH Elite 20 — 20A WiFi Smart Switch with LCD Display & Temperature/Humidity Control
The premium TH controller with a built-in LCD display. The SONOFF TH Elite 20 (THR320D) is a 20A WiFi smart switch with an RJ9 sensor port and on-device screen showing real-time temperature, humidity, or moisture readings at a glance. Automate heating, cooling, irrigation, and humidity control based on live sensor data. 6-month data history, ESP32 chip, DIN rail mount. MPN: THR320D.
Choose your TH controller:
⚡ Key Features
- Built-In LCD Display — see real-time temperature, humidity, or moisture readings directly on the device without opening the app; ideal for DB boards and utility rooms
- 20A / 4,400W Maximum Load — handles geysers (under 20A), heaters, dehumidifiers, aircon, extractors, and high-power appliances
- RJ9 Sensor Port — plug in THS01 (temp+humidity), DS18B20 (waterproof temp), or MS01 (soil moisture); sensor data displayed on LCD and in the app
- Auto-Mode (Thermostat/Humidistat) — set a target temperature or humidity; the relay maintains your setpoint automatically
- 6-Month Data History — view sensor data trends over 6 months in the eWeLink app; export for analysis
- ESP32 Chip — fast, reliable WiFi connectivity and OTA firmware updates
- DIN Rail Mountable — professional installation in your DB board
- Schedules & Smart Scenes — combine time-based schedules with sensor triggers
- RL560 Extension Cable — extend THS01/DS18B20 up to 60m, MS01 up to 10m
- Home Assistant — eWeLink add-on, SonoffLAN, Tasmota, ESPHome
- Voice Control — Alexa, Google Assistant
🏠 Perfect For
Smart Thermostat
Plug in THS01 sensor. Set target temp to 21°C. The Elite turns your heater on/off automatically. The LCD shows the current reading — no phone needed to check.
Humidity Control
Monitor humidity via the LCD and automate extractors or dehumidifiers. “If humidity > 65% → fan on.” Prevent mould in bathrooms, laundries, and storage rooms.
Smart Irrigation
Plug in MS01 soil moisture sensor. Automate irrigation pumps when soil gets dry. The LCD display shows the current moisture percentage at a glance.
Farming & Greenhouses
Maintain precise temperature and humidity for poultry, reptiles, seedlings, or mushroom cultivation. The LCD provides instant readings during walkabouts.
🔗 Compatible Sensors (Sold Separately)
SONOFF THS01
Temperature & humidity sensor. ±0.3°C / ±3% RH accuracy. Indoor use. RJ9 plug-and-play.
View Sensor →
DS18B20 Waterproof Probe
Stainless steel waterproof temperature probe. -55°C to +125°C. For geysers, pools, pipes, outdoor.
View Sensor →
SONOFF MS01 Soil Moisture
Soil moisture sensor for automated irrigation. Weatherproof. Trigger watering based on soil dryness.
View Sensor →
📋 Technical Specifications
| Product | SONOFF TH Elite 20 Smart Switch |
| MPN / Model | THR320D |
| Max Load | 20A / 4,400W @ 220V AC |
| Input Voltage | AC 100–240V, 50/60Hz |
| Display | Built-in LCD (temp/humidity/moisture) |
| Sensor Port | RJ9 (sensor sold separately) |
| Compatible Sensors | THS01 · DS18B20 · MS01 |
| Data History | 6 months via eWeLink app |
| Chip | ESP32 |
| WiFi | 2.4 GHz 802.11 b/g/n |
| Mounting | DIN rail (35 mm) |
| Home Assistant | eWeLink add-on · SonoffLAN · Tasmota · ESPHome |
| Voice Control | Amazon Alexa · Google Assistant |
| Warranty | 1 Year Manufacturer Warranty |
❓ Frequently Asked Questions
Is a sensor included?
What does the LCD display show?
What’s the difference between Elite and Origin?
Can I extend the sensor cable?
🤝 Need Help? We’re Here for You!
Visit Us
8 Wildebraam Street
Weltevreden Park, Roodepoort
Gauteng, 1709
See Your Readings. At a Glance.
20A smart switch with LCD display and RJ9 sensor control.
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