The AHT21 is a high-precision digital temperature and humidity sensor with I2C output, designed for engineers who want accurate environmental data without drama. Its compact, low-profile package makes it a breeze to drop into your next project—no drama, just data.

Powered by a newly designed ASIC-specific chip and an improved MEMS capacitive humidity sensing element, the AHT21 delivers stable performance and easy integration—even in harsher environments. It includes a standard on-chip temperature sensing element so you get calibrated digital readings with minimal fuss.

Key Features & Design

• Module size: 16*11 mm
• Interface type: I2C
• Working voltage: 1.8 - 6.0 V
• Interface size: 4*2.54mm pitch
• Humidity accuracy: typical ± 2%
• Humidity resolution: 0.024%
• Temperature accuracy: typical ± 0.3 ° C
• Temperature resolution: Typical 0.01 °C
• Working temperature: -40°C--85°C
• Package includes: 1 * AHT21 I2C IIC High Precision Digital Temperature and Humidity Sensor

Note: Please make sure put it in the environment of humidity greater than 80% for 12 hours to ensure the accuracy is restored before using.