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Small green rectangular circuit board with silver sensor component and gold contact pads

Adafruit

Adafruit HTU31 Temperature Humidity Sensor Breakout Board Engineering Development Tool

SKU CH-ZGG3-195GT

Accurate I2C temperature and humidity sensor with ±2% RH typical accuracy, on-board heater for condensation control, and thermal-isolation cutout for reliable readings from 0 to 70°C

  • TypePrototyping Products
  • Accurate humidity readings with ±2% typical accuracy across 20% to 100% RH
  • Reliable temperature data at ±0.2°C precision from 0°C to 100°C
  • On-board heater clears condensation from the sensing element when activated
  • Thermal-isolation cut-out reduces influence from nearby circuitry on measurements
  • Intelligent I2C digital sensor replaces common DHT-series devices with better performance

Breakout board for environmental sensing

The Adafruit HTU31 breakout board provides an I2C digital sensor for temperature and relative humidity measurements. It is designed for engineers, hobbyists and students who need a compact development tool for environmental monitoring projects. The board serves as an accurate and intelligent alternative to common DHT-series sensors.

Typical accuracy across the operating range

The sensor delivers a typical accuracy of ±2% relative humidity across 20% to 100% at a temperature range of 0 to 70°C. Temperature output accuracy is ±0.2°C from 0 to 100°C. Operation outside the specified humidity range is still possible, though accuracy may drop slightly. The on-board heater can be toggled to evaporate condensation on the sensing element.

Thermal isolation for stable readings

A thermal-isolation cut-out on the board reduces the influence of nearby circuitry heat on measurements. This design helps maintain consistent sensor performance during sustained operation. The controllable heater function manages condensation without adding continuous thermal load to the sensing element. Power draw remains minimal for typical low-power applications.

Points forts

  • Accurate humidity readings with ±2% typical accuracy across 20% to 100% RH
  • Reliable temperature data at ±0.2°C precision from 0°C to 100°C
  • On-board heater clears condensation from the sensing element when activated
  • Thermal-isolation cut-out reduces influence from nearby circuitry on measurements
  • Intelligent I2C digital sensor replaces common DHT-series devices with better performance

Caractéristiques

TypePrototyping Products

Questions sur cet article

How much power does the HTU31 sensor draw when running continuously?

The sensor operates over 0 to 70 °C with typical accuracy of ±2 % relative humidity and ±0.2 °C temperature, drawing only microamps in normal use.

What must I already have to read data from this breakout board?

You need a microcontroller or single-board computer with an I2C bus and pull-up resistors on the SDA and SCL lines.

Will the HTU31 work alongside my older HTU21D sensor on the same I2C bus?

The HTU31 uses a fixed I2C address that differs from the HTU21D, so both can share the bus without address conflicts.

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