Gravity AHT20 Temperature and Humidity Sensor

The DFRobot Gravity AHT20 measures temperature and humidity with the AHT20, a capacitive MEMS humidity sensor with digital I2C output. The accuracy is ±0.3 °C and ±2 % RH, and the measuring range extends from -40 °C to 85 °C. The module runs on 2 V to 5 V and is connected to Arduino, ESP32 or Raspberry Pi without soldering via the Gravity connector.

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces

Features:

• AHT20, digital temperature and humidity sensor
• Temperature ±0.3 °C, humidity ±2 % RH
• Measuring range -40 °C to 85 °C and 0 to 100 % RH
• Low long-term drift
• I2C, address 0x38
• 4-pin Gravity connector, operation from 2 V to 5 V

Application Examples:

• Room climate, heating and ventilation
• Dehumidifiers and household appliances
• Data loggers and weather stations
• Test and control devices

Documentation:

• DFRobot Wiki SEN0528
• Example for Arduino with library DFRobot_AHT20 (DFRobot Wiki)
• Dimension drawing (PDF)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0528
• Sensor: AHT20
• Operating voltage: 2 V to 5 V DC
• Operating current: 0.27 mA at 3.3 V
• Interface: I2C, address 0x38
• Humidity: 0 to 100 % RH, ±2 % RH, resolution 0.024 % RH, repeatability ±0.1 % RH, hysteresis ±1 % RH, response time 8 s, drift below 0.5 % RH per year
• Temperature: -40 °C to 85 °C, ±0.3 °C, resolution 0.01 °C, repeatability ±0.1 °C, response time 5 to 30 s, drift below 0.04 °C per year
• Connection: 4-pin Gravity (+, -, SCL, SDA)
• Dimensions: 30 × 20.5 × 7 mm
• Weight: 12 g

Scope of Delivery:

• 1× Gravity AHT20 temperature and humidity sensor
• 1× 4-pin Gravity cable (PH2.0 to Dupont female)