Temperature and Humidity Sensor - DHT22

AM2302 output calibrated digital signal. It applys exclusive digital-signal-collecting-technique and humidity sensing technology, assuring its reliability and stability. Its sensing elements is connected with 8-bit single-chip computer.

Every sensor of this model is temperature compensated and calibrated in accurate calibration chamber and the calibration-coefficient is saved in type of programme in OTP memory, when the sensor is detecting, it will cite coefficient from memory.
Small size & low consumption & long transmission distance(100m) enable AM2302 to be suited in all kinds of harsh application occasions. Single-row packaged with four pins, making the connection very convenient.

FEATURES

• High precision
• Capacitive type
• Full range temperature compensated
• Relative humidity and temperature measurement
• Calibrated digital signal
• Outstanding long-term stability
• Long transmission distance, up to 100 meters
• Low power consumption

SPECIFICATION

• 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 +/-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 
• Interchangeability: Fully interchangeable ​