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About Humidity Tag

The Humidity Tag uses a high-accuracy humidity sensor SHT20 with a typical accuracy of ±3 % from 20 % to 80 %. This sensor is digital and calibrated. It communicates using an I²C bus and features a very low power operation and shutdown mode.


Relative humidity is the essential attribute of the environment we live in. The recommended indoor range is between 30 % and 60 %.

Values below this range (dry air) can lead to various health issues. On the other hand, the values above this range may result in trouble with moisture.


  • Integrated humidity sensor SHT20 (Sensirion)
  • Communication using the I²C bus
  • Measurement range: 0 % to 100 %
  • Measurement accuracy: ±2 %
  • Optional interrupt output
  • Operating current: 10 µA
  • Operating voltage range: 1.8 V to 3.3 V
  • Operating temperature range: -40 to 125 °C
  • Mechanical dimensions: 16 x 16 mm