HTU21D Temperature & Humidity Sensor


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.

Out of stock


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