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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