Asair DHT22 Digital Temperature and Humidity Sensor

Asair DHT22 Digital Temperature and Humidity Sensor

The DHT22 (AM2302) is a high-precision digital temperature and humidity sensor designed for environmental monitoring, weather stations, home automation systems, and IoT applications. Featuring a capacitive humidity sensing element and a thermistor-based temperature sensor, it delivers accurate and reliable measurements with excellent long-term stability.

Unlike the basic DHT11 sensor, the DHT22 offers a wider measurement range, higher accuracy, and better resolution, making it suitable for professional and industrial-grade projects. The sensor communicates through a simple single-wire digital interface, allowing easy integration with Arduino, ESP32, Raspberry Pi, STM32, and other microcontroller platforms.

Each sensor is factory calibrated and fully interchangeable, ensuring consistent performance across multiple deployments.

Key Features

• High-accuracy digital temperature and humidity sensor
• Single-wire digital communication interface
• Wide operating temperature range from -40°C to 80°C
• Humidity measurement range from 0% to 100% RH
• Factory calibrated for accurate readings
• Excellent long-term stability
• Low power consumption
• Fully interchangeable sensor units
• Easy integration with popular microcontrollers and development boards

Technical Specifications

• Model: DHT22 / AM2302
• Operating Voltage: 3.3V – 6V DC
• Output Signal: Digital (1-Wire Bus)
• Sensing Element: Polymer Capacitor
• Humidity Measurement Range: 0% – 100% RH
• Temperature Measurement Range: -40°C to 80°C
• Humidity Accuracy: ±2% RH (Maximum ±5% RH)
• Temperature Accuracy: ±0.5°C
• Humidity Resolution: 0.1% RH
• Temperature Resolution: 0.1°C
• Humidity Repeatability: ±1% RH
• Temperature Repeatability: ±0.2°C
• Humidity Hysteresis: ±0.3% RH
• Long-Term Stability: ±0.5% RH per year
• Sampling Period: Approximately 2 Seconds
• Interchangeability: Fully Interchangeable

Applications

• Weather monitoring stations
• Smart home automation
• Greenhouse monitoring
• HVAC systems
• Industrial environmental monitoring
• Data logging systems
• IoT and embedded projects

Package Includes

• 1 × DHT22 (AM2302) Digital Temperature and Humidity Sensor