SONOFF High Precision Temperature and Humidity Sensor

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SONOFF High Precision Temperature and Humidity Sensor

The SONOFF-SI7021 is a high precision digital temperature and humidity sensor that works with the SONOFF-TH16 thermostat. The combination of SONOFF-SI7021 and the SONOFF-TH16 thermostat provides WIFI remote control for humidifiers, electric heaters and air conditioners in the smart home.

You can monitor and maintain temperature and humidity by controlling an appliance by downloading the on-line cellphone application eWeLink.

Simply preset temperature and humidity range on your cellphone and it will automatically turn on or turn off the connected device.

This combination also works with Amazon Alexa, Echo, Echo Dot, as well as with Google Home and Goggle Nest voice assistants for local control.

One mobile phone can control multiple wireless remote controls at the same time.

Multiple mobile phones can control individual wireless remote controls.


  • Sensor type: Calibrated Integrated single chip digital sensor w/8bit MCU
  • Operating temperature range: -40℃ - 80℃
  • Power supply: 2.2-3.6VDC
  • Temperature Measuring Range: -40℃ to + 85℃
  • Temperature Accuracy: ±0.3℃ (-10 to+ 85℃)
  • Humidity Measuring Range: 0-99.9% RH
  • Humidity Accuracy: ±2% RH (0-80%)
  • Connector: 4 pole 3.5mm plug
  • Cable Length: 0.5m
  • Weight: 26 gm

eWeLink APP: 

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