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Measure Temperature with a Sensor Made for Embedded Builds

The Temperature And Humidity Htu21D-F Sensor Board is a temperature and humidity sensor with i2c designed for climate logging, weather nodes, and room monitoring. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.

Key details include Operating Temperature Range: -40°C to +125°C; Supply Voltage: 3.3V to 5V (regulated onboard); Interface: I2C.

Important: Sensor response time depends on airflow, mounting, and thermal contact. Keep heat sources and self-heating from nearby parts in mind.

Why you’ll love it

  • Factory-calibrated: Factory-calibrated for high precision.
  • STEMMA QT connector: STEMMA QT connector for easy integration with compatible systems.
  • Sensing range: -40°C to +125°C
  • Power range: 3.3V to 5V (regulated onboard)
  • Expected accuracy: ±0.3°C (typical) from -30°C to 90°C
  • Useful spec: 0x40

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What you can build

This sensor is a good fit for weather stations, room monitors, greenhouses, incubators, and climate data loggers.

Starter bundles

Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus an I2C cable or jumper wires for quick setup and testing.

Recommended add-ons

Useful add-ons include probe mounts, thermal paste if needed, and a data logger, depending on how you plan to power, mount, and log the sensor.

Technical specifications

Product Temperature And Humidity Htu21D-F Sensor Board
Operating Temperature Range -40°C to +125°C
Temperature Range - 40°C to +125°C
Humidity Range 0% to 100% Relative Humidity (RH)
Supply Voltage 3.3V to 5V (regulated onboard)
Temperature Accuracy ±0.3°C (typical) from -30°C to 90°C
Humidity Accuracy ± 2% RH (from 20% to 80% RH), ±3% RH (outside this range)
Default I2C Address 0x40
Interface I2C

Wiring & usage notes

Connect VCC, GND, SDA, and SCL to your controller. Use the correct board voltage and I2C address in your code. Sensor response time depends on airflow, mounting, and thermal contact. Keep heat sources and self-heating from nearby parts in mind.

What’s in the box

1 × Temperature And Humidity Htu21D-F Sensor Board

Frequently Asked Questions

What does the Temperature And Humidity Htu21D-F Sensor Board measure? It is designed to measure temperature and humidity.
Can I use it with Arduino, ESP32, or Raspberry Pi? Yes. It is well suited for common maker and embedded platforms, as long as you power it at the correct voltage and match the signal level to your controller.
How do I connect this I2C sensor? This version uses I2C, so you usually connect VCC, GND, SDA, and SCL.
What affects accuracy? Power quality, wiring, mounting, target material, and the real environment can all affect the reading. It is best to test and calibrate in the final setup.
Is it good for prototyping? Yes. It is a practical choice for learning, proof-of-concept builds, and small automation projects.

Temperature And Humidity Htu21D-F Sensor Board

Temperature And Humidity Htu21D-F Sensor Board

Low stock: 4 left

Product Code

1899

₱ 825.00
₱ 825.00 ₱ 825.00
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