Gravity: AHT20 Temperature and Humidity Sensor

SKU: SEN0528

The AHT20 is a high-precision but low-cost temperature and humidity sensor, which is equipped with an improved MEMS semiconductor capacitive humidity sensor element. It features standard I2C interface and a wide voltage supply of 2V - 5V. And with simple peripheral circuit, it performs stably even in harsh environments in the measuring range of -40 - +85℃. <br/> This sensor can be widely used for measuring the environmental temperature and humidity of home electronic equipment, the temperature and humidity of automobiles and so on.

Front of AHT20 temperature & humidity sensor module with LEDs and connector for Arduino.-DFRobot product sku:SEN0528 image.

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  • Specification

    Parameter Value
    Operating Voltage DC2V~5V
    Operating Current 0.27mA (at 3.3V)
    Communication Protocol I2C
    I2C Address 0x38
    Dimension 30mm×20.5mm/1.18×0.81"

    AHT20 Chip Parameters

    Relative Humidity
    Parameter Value
    Resolution 0.024 %RH
    Accuracy ±2 %RH
    Repeatability ±0.1 %RH
    Hysteresis ±1 %RH
    Non-linear ±0.1 %RH
    Response Time 8S
    Operating Range 0~100 %RH
    Long-term Drift <0.5 %RH/yr
    Temperature
    Parameter Value
    Resolution 0.01℃
    Accuracy Error ±0.3℃
    Repeatability ±0.1℃
    Hysteresis ±0.1℃
    Response Time minimum 5S, maximum 30S
    Operating Range -40℃~85℃
    Long-term Drift <0.04℃/yr

    Pinout

    Pin Function Description
    + Positive Power Supply Power Supply: DC 2V~5V
    - Negative Power Supply --
    SCL I2C Clock Line --
    SDA I2C Data Line --

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