HTU21D Temperature & Humidity Sensor

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The HTU21D is a low-cost, easy to use, highly accurate, digital humidity and temperature sensor. This sensor is ideal for environmental sensing, data logging and perfect for weather stations or humidor control systems.

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Description

The HTU21D-F Temperature & Humidity Sensor has only four pins that need to be hooked up in order to start using this sensor in a project. One for VCC, one for GND, and two data lines for I2C communication. This breakout board has built in 4.7k pull-up resistors for I2C communications. If you’re hooking up multiple I2C devices on the same bus, you may want to disable these resistors.

HTU21D Temperature & Humidity Sensor

  • Power Supply: 1.5V-3.6V
  • Humidity measuring range: 0-100% RH
  • Temperature range: -40 -105 degree
  • Maximum power consumption: 2.7uW
  • Communication: I2C
  • Humidity accuracy range (10% RH to 95% RH): HTU21D ± 2% RH
  • Humidity Hysteresis: ± 1% RH
  • Measurement time: 50ms
  • The annual shift: -0.5% RH / year
  • Response time: 5 s