Gravity: AHT20 Temperature and Humidity Sensor
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Description
The Gravity AHT20 Temperature and Humidity Sensor is an accurate, cost-effective environmental sensing module powered by an improved MEMS capacitive element. Operating across a 2V to 5V DC range with standard I2C digital output, it is an ideal solution for students, makers, and educators developing weather stations, automated climate controllers, and IoT projects.
High precision environmental monitoring
The module measures relative humidity from 0 to 100% RH with an accuracy of ±2% RH, alongside temperatures ranging from -40℃ to 85℃ with ±0.3℃ accuracy. It features rapid response times and excellent long-term stability with low annual drift.
Solderless Gravity wiring
Equipped with a standard 4-pin Gravity connector, the board eliminates the need for soldering and simplifies wiring to microcontrollers. The module includes a matching Gravity-4P I2C/UART sensor cable for immediate plug-and-play setup.
Standard I2C digital interface
The sensor communicates over I2C at address 0x38, ensuring dependable digital data transmission with strong anti-interference capability. Its wide 2V to 5V operating voltage provides broad compatibility with 3.3V and 5V development boards.
Broad application compatibility
Measuring just 30mm by 20.5mm, the compact footprint fits easily into home automation systems, weather stations, dehumidifiers, and automotive testing rigs.
Supplied package contents
The kit includes one Gravity AHT20 Temperature and Humidity Sensor module and one Gravity-4P I2C/UART sensor cable.
Downloads & documentation
Specifications
| Operating Voltage | DC2V-5V |
| Output Signal | I2C |
| I2C Address | 0x38 |
| Dimension | 30mm×20.5mm/1.18×0.81" |
| Resolution | 0.024 %RH |
| Accuracy Error | ±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 |
In the box
| Gravity: AHT20 Temperature and Humidity Sensor × 1 | 1 |
| Gravity-4P I2C/UART Sensor Cable × 1 | 1 |
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