Overview
The AHT25 Sensor is an integrated digital temperature and humidity sensor with I2C communication interface. It combines a capacitive humidity sensing element and a temperature sensing component in a compact package. The sensor is fully calibrated at the factory and designed for stable and accurate measurements over a wide range of environmental conditions. Typical applications include environmental monitoring, HVAC systems, weather stations, data logging, and microcontroller-based control systems.
The sensor operates from a low-voltage DC supply and provides humidity and temperature data via the I2C bus. Accuracy and measurement range specifications are suitable for a broad range of consumer, industrial, and laboratory applications.
Key Features
• Digital temperature and humidity output via I2C interface
• Factory calibrated for reliable measurement accuracy
• Wide operating voltage range suitable for battery and logic systems
• Compact form factor suitable for embedded applications
• Low power consumption for continuous or periodic monitoring
• Fast response and stable long-term performance
• Standard I2C address simplifies integration with controllers
Electrical and Usage Notes
• Supply voltage typically from 2.2 V to 5.5 V DC
• I2C communication requires pull-up resistors on SDA and SCL lines if not provided by host
• The sensor’s default I2C address is 0x38, ensure no address conflicts with other bus devices
• Operating outside the specified voltage or temperature range may degrade accuracy or damage the sensor
• Protective placement and shielding recommended in high-airflow or condensation environments
Typical Applications of the AHT25 Sensor
• Environmental monitoring and logging
• Weather station and climate sensing systems
• HVAC control and feedback systems
• Smart home automation sensors
• Industrial process monitoring
• Microcontroller development and embedded systems
Specifications
| Sensor Type | Digital temperature and humidity sensor |
| Communication Interface | I2C |
| Supply Voltage | 2.2 V to 5.5 V DC |
| Temperature Measurement Range | −40 °C to +80 °C (typical) |
| Temperature Accuracy | ±0.3 °C (typical) |
| Humidity Measurement Range | 0 % to 100 % RH |
| Humidity Accuracy | ±2 % RH (typical) |
| Default I2C Address | 0x38 |
| Package | SIP-4 through-hole package (1.27mm pitch) |
