DHT22/AM2302 Digital Temperature And Humidity Sensor

Description

Description

• DHT22 utilizes exclusive digital signal collecting technique and humidity sensing technology and can ouptut calibrated digital signal.
• Small size & low consumption & long transmission distance (20 meters) enable AM2303 to be suited in all kinds of harsh applications.
•  When power is supplied to sensor don’t send any instruction to it withing one second to pass unstable status.
• It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin.

• Connections are simple, the first pin on the left to 3-5V power, the second pin to your data input pin and the right most pin to ground.

  One 100nF capacitor can be added between VDD and GND for wave filtering.

  Technical details:

  • Power: 3-5V
  • Max Current: 2.5mA
  • Humidity: 0-100%, 2-5% accuracy
  • Temperature: -40 to 80°C, ±0.5°C accuracy
    

     http://playground.arduino.cc/Main/DHTLib

    Google for ‘DHT22 datasheet’ or ‘RHT03 datasheet’ for available datasheets

    download DHT22 datasheet