Sonoff TH Origin Smart Temp and Humidity Switch (16A or 20A – sensors optional)


The SONOFF Origin is the replacement of the Sonoff TH10 / TH16 switches and is a Smart Temperature and Humidity monitoring switch, rated either 16A or 20A. The Sonoff TH Origin can be used to monitor the temperature and humidity in real-time and once they reach your preset threshold or the device’s on/off state changes, a push notification can be sent to your smartphone.

  • 16A or 20A Max Output: Support to connect 20A Max high load, compatible with more home appliances.
  • 6-Month Temp & Humidity Historical Data, by Hours: Support to check the temp & hum history data by hour, day and month. Past 6-month history data can be exported in .xlsx format and accurate to hour.
  • Local Automatic Control: Support LAN control, the device can turn on/off automatically according to the temp & humidity thresholds at different time periods. You can set 8 automatic control programs for you to save electricity bills and create comfortable surroundings.
  • Voice Control: Compatible with Alexa, Google Assistant. Just speak out your command, they can do on/off as you say, and check the temperature and humidity for you.
  • Smart Scenes: TH Origin can trigger other smart devices when the temperature and humidity reach the threshold or the device switches on or off. The device on, off, and invert can also as execute action.

(Refer additional notes at the end of this section)

The SONOFF TH Origin (the upgrade version of TH10/TH16) is a smart temperature and humidity monitoring switch with ESP32 chip which monitors the temperature and humidity in real time. Once the preset threshold is reached or the device’s on/off state changes, you will receive a push notification on your phone.

This Sonoff switch supports a maximum of 16A / 20A, suitable for most high load equipment e.g. electric floor heating and also maintains a 6-month Temp & Humidity history, accurate to the hour.

The Smart scene controls include temperature, humidity and on / off as triggers and this switch is also supports Home Assistant integration for control and automation through the eWeLink add-on.

The following SONOFF sensors are supported by the TH Elite:

  • THS01: Temp & Humidity Sensor
  • DS18B20: Waterproof Temp sensor
  • MS01: Soil Moisture Sensor
  • RL560: Sensor extension cable to extend your device’s distance to 60m for the THS01 and DS18B20, or 10m for the MS01 Soil Moisture Sensor .

The connectors of all sensors have been upgraded to RJ9 plug connectors and now support hot-plug in, making the connection more stable and reliable.

THS01 Sensor

  • Sensor Type: Temperature & Humidity sensor
  • Connector type: RJ9 4P4C
  • Temperature Measuring Range: –40℃~+85°C
  • Humidity Measuring Range: 0~100%RH
  • Cable Length: 50cm

DS18B20 Sensor

  • Sensor Type: Waterproof temperature sensor
  • Connector type: RJ9 4P4C
  • WorkigTemperature: -55℃~+125℃
  • Length: 50cm

MS01 Sensor

  • Sensor Type: Soil Moisture Sensor
  • Humidity Measuring Range: 0~100%RH
  • Operating Temperature Range: 0℃~60°C
  • Cable Length: 50cm

RL560 Sensor Extension Cable (also enquire about our CAT5 5m and 10m extension cables)

  • Conductor resistance: max.10Ω
  • Insulation resistance: min.5MΩ
  • Length: 5m cable length & Max. 60m extendable length.




  • THS01 (Temperature and Humidity) and WTS01 (Waterproof Temperature) are designed for use with the TH Elite series.  The MS01 (Soil Moisture) comes with a free RJ9 adapter to fit the TH Elite.
  • The RL560 is the standard Sonoff sensor extension cable with RJ9. Alternative CAT5 extension cables are also available and can be manufactured to custom lengths.
  • No sensors are included with the TH Origin or TH Elite switches and should be ordered separately.
  • This device needs to connect to your 2.4 GHz router for WiFi control.


  1. MAKE SURE THAT THE “AUTO” FUNCTION IS ENABLED when using temperature triggers to control a geyser (“Auto” should be highlighted.)
  2. If you are unable to select Auto, ensure that you have defined the settings.
    • Click on “Set” and add the relevant rules.
    • Click on “Save” to ensure that the settings have been applied.
    • Example of settings to switch geyser ON when temperature is lower than 50°C and OFF when temperature is higher than 70°C during the period 22:00 to 06:00 with State set as OFF outside the effective period:
  3. Theoretically, a Sonoff 20A smart switch should be able to handle geyser elements up to 3kW. It is however recommended to use an adequately rated contactor or relay with the Sonoff switch to allow the main current to pass through the contactor / relay, instead of the Sonoff switch.
Weight 91 g

20 Amp, 16 Amp

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