SmartElex AHT20 Temperature & Humidity Sensor

The AHT20 sensor measures temperature and humidity using a capacitive humidity sensing element and a high-precision temperature measuring element. It outputs the data in digital form via an I2C interface.

Capacitive humidity sensor

Precision temperature sensor

• Avoid Using Multiple Devices On The Same Bus: Since the I2C address cannot be changed, do not use multiple AHT20 sensors on the same I2C bus.,
• Do Not Expose To Extreme Conditions: Avoid exposing the sensor to conditions outside its operational range of -40 to 85 °C for temperature and 0 to 100% RH for humidity.,
• Avoid Physical Stress: Do not subject the sensor to excessive force or pressure to prevent damage.

• Use Appropriate Logic Level: Ensure that the logic level matches your microcontroller; the sensor supports both 3.3V and 5V.,
• Check I2c Address: Verify the I2C address (0x38) is correct and not conflicting with other devices on the I2C bus.,
• Implement Proper Error Handling: Handle potential I2C communication errors in your software to ensure robust operation.

• Range: 0 to 100 RH%,
• Typical Accuracy: ±3 % over the entire range

• Range: -40 to 85 °C,
• Typical Accuracy: ±1 °C over the entire range

• Power Requirements: Connect the sensor to a 3.3V or 5V power supply.,
• Data Communication: Connect the I2C SDA and SCL lines to your microcontroller or Raspberry Pi board.,
• No Soldering Required: Utilize the Molex PicoBlade connectors for easy connection without the need for soldering.

25.17 mm

6 × 4 × 2 cm

0.008 kg

17.87 mm