SEN0428, Fermion: SHT40 Temperature & Humidity Sensor (Breakout)

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The SEN0428 is a 4th generation digital temperature and humidity sensor from Sensirion. In line with Sensirion’s industry-proven humidity and temperature sensors, the SHT40 offers consistent high accuracy within the measuring range.

The SHT40 sensor covers a humidity measurement range of 0 to 100%RH and a temperature detection range of -40°C to 125°C with a typical accuracy of ±1.8%RH and ±0.2℃. The internal variable power heater enables the device to work properly under extreme operating conditions like condensing environment.

The board supply voltage of 3.3V to 5V and a current consumption below 0.15mA in low power mode make the SHT40 perfectly suitable for mobile or wireless battery-driven applications. It is suitable for urban environment monitoring, intelligent buildings, industrial automation, smart home and other Internet of Things applications.


  • High Accuracy
  • Low Power Consumption
  • Small Size
  • Fast Response


  • Operating Voltage: 3.3V-5V
  • Operating Current: 0.45mA
  • Communication Interface: I2C
  • Response Time: 8s (tau63%)
  • Humidity Measurement Range: 0~100%RH
  • Humidity Measurement Accuracy: ±1.8%
  • Temperature Measurement Range: -40~+125℃ (-40 to +275℉)
  • Temperature Measurement Accuracy: ±0.2℃
  • Dimension: 14x17mm/0.55x0.67"
  • Mounting Hole Size: M2 (2mm)
  • Mounting Hole Pitch: 10mm


  • Intelligent Buildings and Furniture
  • Weather Station
  • Warehouses
  • Animals and Plants Culture
  • Animal Incubator
  • Germinating Box for plant seed



  1. Fermion:SHT40 humidity & temperature sensor x1

Schematics (98f2c498d566ea02fed2d9801510c47f.PDF, 440 Kb) [Download]

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