DHT22/AM2302 Digital Temperature and Humidity Sensor

The DHT22 is a high accuracy digital temperature and humidity sensor. It operates over the entire range of humidity and from -40 to 80 C. Its robust electrical design allows it to operate with wires up to 20M.

Specifications:

• Model: DHT22
• Power Supply: 3.3-6V DC
• Output signal: Digital via single-bus
• Sensing Element: Polymer capacitor
• Operating range:
•  Humidity: 0-100%RH
• Temperature: -40~80Celsius
• Accuracy
• Humidity: +-2%RH(Max +-5%RH)
• Temperature: <+-0.5Celsius
• Resolution:
• Humidity: 0.1%RH
• Temperature: 0.1Celsius
• Repeatability:
• Humidity: +-1%RH
• Temperature: +-0.2Celsius
• Humidity Hysteresis: +-0.3%RH
• Sensing Period: 2s(Average)