DHT22 / AM2302 Temperature & Humidity Sensor

DHT22 / AM2302 High-Precision Digital Sensor

The DHT22 (AM2302) is a superior upgrade to the DHT11, offering extended measurement ranges and laboratory-grade accuracy. It uses a capacitive humidity sensing element and high-grade DS18B20-class digital thermal IC, providing 16-bit high-resolution temperature and humidity readings.

Specifications

• Temperature Range: -40°C to +80°C (±0.5°C accuracy, 0.1°C resolution)
• Humidity Range: 0% to 100% RH (±2% RH accuracy, 0.1% resolution)
• Operating Voltage: 3.3V to 6V DC
• Current Draw: 1.5 mA active, 40 μA standby
• Transmission Distance: Up to 20 meters over unshielded twisted pair
• Interface: Single-bus proprietary digital signal