AOSONG AHT25 Sensor for Temperature and Humidity

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