Sonoff THR320D TH Elite Wi-Fi temperature and humidity relay, 20 A
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Choose countryThe Sonoff THR320D TH Elite is a 20 A Wi-Fi relay for controlling equipment and monitoring temperature or humidity with a connected sensor. Applications include heating, irrigation, greenhouses, terrariums, wineries and indoor swimming pools.
Sensor-based control
The RJ9 4P4C connector supports the sealed DS18B20 temperature sensor, SI7021 air humidity sensor or MS01 soil moisture sensor. Auto mode lets the relay control connected equipment using sensor readings.
- App controls: eWeLink provides remote switching, a timer, schedules and 8 programmes.
- Alerts and history: receive notifications when equipment switches on or off or reaches a set value. View hourly, daily and monthly graphs, and export the last 6 months of historical data in XLSX format.
- Integrations: works with Home Assistant, IFTTT, Amazon Alexa and Google Assistant, with automation options involving other smart devices.
- Local control: LAN support allows control over the local network when internet access is temporarily unavailable.
Physical controls and installation
A large button provides on/off control at the device. A mounting rail and user manual are included. The enclosure uses flame-resistant PC V0, with a front shield and a wiring system offering short-circuit protection.
| Manufacturer | Sonoff |
|---|---|
| Model | THR320D |
| Colour | White |
| Material | PC V0 |
| Voltage, frequency and maximum current | 100–240 V ~, 50/60 Hz; 20 A max |
| Wi-Fi | IEEE 802.11 b/g/n, 2.4 GHz |
| Dimensions | 98 × 54 mm |
| Sensor connector | RJ9 4P4C |
| Compatible sensors | DS18B20 — temperature; SI7021 — air humidity; MS01 — soil moisture |
| Control app | eWeLink |
| Integrations | Home Assistant, IFTTT, Amazon Alexa, Google Assistant |
| Number of programmes | 8 |
| Control functions | Auto mode, timer, schedules, on/off button |
| Data history | Hourly, daily and monthly graphs; last 6 months exportable in XLSX format |
| Local control | LAN support |
| Material compliance | UL and RoHS requirements |
| EAN | 6920075777543 |
|---|
Which sensors can I connect?
The relay supports the sealed DS18B20 for temperature, SI7021 for air humidity and MS01 for soil moisture, using its RJ9 4P4C connector.
What is included?
The package contains the smart relay, a mounting rail and a user manual.
Can I control it without internet access?
LAN support allows control over the local network when internet access is temporarily unavailable.
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