DHT22 Digital Temperature And Humidity Sensor for Arduino/Raspberry-Pi/Robotics

The AM2302 or DHT22 is a temperature & humidity sensor whose output having calibrated digital signal. It applies exclusive digital-signal-collecting-technique and humidity sensing technology, assuring its reliability and stability. Its sensing elements are connected with 8-bit single-chip computer.

Specifications of DHT22 Digital Temperature And Humidity Sensor:

• Model AM2302.
• Power supply 3.3-5.5V DC.
• Output signal digital signal via 1-wire bus.
• Sensing element Polymer humidity capacitor.
• Operating range humidity 0-100%RH; temperature -40~80 Celsius.
• Accuracy humidity humidity+-2%RH(Max +-5%RH); temperature +-0.5Celsius.
• Resolution or sensitivity humidity 0.1%RH; temperature 0.1Celsius.
• Repeatability humidity +-1%RH; temperature +-0.2Celsius.
• Humidity hysteresis +-0.3%RH.
• Long-term Stability +-0.5%RH/year.
• Fully interchangeable

Features of DHT22 Digital Temperature And Humidity Sensor:

• High precision.
• Capacitive type.
• Full range temperature compensated.
• Relative humidity and temperature measurement.
• Calibrated digital signal.
• Outstanding long-term stability.
• Extra components not needed.
• Long transmission distance, up to 100 meters.
• Low power consumption.
• 4 pins packaged and fully interchangeable.

Applications of Finger Print Module:

• Operating and storage conditions.
• Attentions to chemical materials.
• Attention to temperature's affection.
• Welding temperature should be bellow 260 Celsius.
• Avoid using the sensor under dew condition Car door locking system.

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