Smart digital temperature and humidity controller | 20A | 100-240VAC | white | DIN | Wi-Fi | TH Elite | SONOFF | THR320D | 6920075777543

Technical specifications

Manufacturer: SONOFF
Product type: smart temperature and humidity controller
Control type: Wi-Fi / eWeLink app / automatic operation according to set parameters
Input / output voltage: 100–240V AC, 50/60Hz
Maximum load: 20A
Maximum controlled power: up to 230V AC loads according to the permissible current
Additional relay contact: 5–30V, 1A max.
Wi-Fi interface: IEEE 802.11 b/g/n, 2.4GHz
Mounting: on DIN rail or on a flat surface
Housing: PC V0 class flame-retardant plastic
Colour: white
Dimensions: 98 x 54 mm
Compatible sensors: SONOFF temperature and humidity sensors with RJ11 4P4C connector
Possible sensor types: temperature, humidity, water temperature, soil moisture sensors
Data history: up to 6 months of temperature and humidity reading history
Data export: in .xlsx format
App: eWeLink
Additional interfaces: IFTTT, voice control assistants via eWeLink integration

Functions

Temperature and humidity monitoring – measures temperature and humidity in real time according to the connected sensor
Automatic device control – switches the connected load on or off according to the set temperature or humidity limits
Remote control via Wi-Fi – the controller can be controlled by phone via the eWeLink app from any location
Up to 20A load control – suitable for controlling higher-power 230V AC devices, for example electric underfloor heating, a heater or a pump
Autonomous operation without internet – when the Wi-Fi connection is lost, the device continues to operate according to the preset parameters
Compatibility with different sensors – temperature, humidity, water temperature or soil moisture sensors can be connected
Graphs, timer and cyclic operation – allows setting device operation according to time or recurring operating cycles
Data history and export – up to 6 months of temperature and humidity history can be viewed and the data exported in .xlsx format
Phone notifications – informs when temperature, humidity or relay status reaches the set conditions
DIN rail mounting – conveniently mounted in an electrical panel or automation box

Use

For household users: Suitable for homes, apartments, homesteads, greenhouses or auxiliary rooms. It can be used to control electric underfloor heating, a room heater, air humidifier, fan, boiler or pool water temperature monitoring, as well as an irrigation system.

For electricians: A convenient solution for installing a smart thermostat, humidity control system, DIN rail automation or simple 230V load control according to sensor data. The compact housing, DIN mounting and clear connection allow the device to be integrated into an electrical panel or technical box.

For engineers and automation specialists: Useful as a simple but functional control element for low and medium-power systems. It allows monitoring parameter history, exporting data, automating operation according to temperature or humidity limits and integrating into a wider smart device system.

For commercial and technical premises: Used in warehouses, server rooms, technical rooms, garages, workshops, greenhouses, retail premises or small production areas where it is important to maintain the proper temperature or humidity.

Advantages

Smart temperature and humidity control via Wi-Fi
Suitable for heating, humidification, ventilation, irrigation and water temperature systems
Up to 20A load allows controlling higher-power devices
Can replace a standard room thermostat
Operates autonomously according to set parameters even when the internet connection is lost

Disadvantages

Works only with a 2.4GHz Wi-Fi network, does not support 5GHz Wi-Fi
The sensor is usually selected separately according to the specific purpose

Where is this controller most commonly used?

It is most commonly used for controlling room heating, air humidification, ventilation, greenhouses, irrigation systems, water temperature and electric underfloor heating.

Is this controller suitable for electric underfloor heating?

Yes, it is suitable if the heating load does not exceed 20A. If the system is more powerful or the load is high, it is recommended to use an additional contactor.

Will it work without internet?

Yes, when the internet connection is lost, the controller will continue to operate according to the previously set parameters. Internet is required for remote control, notifications and data viewing in the app.

Can temperature and humidity history be viewed?

Yes, up to 6 months of temperature and humidity data history can be viewed and exported in .xlsx format.