Humidity and Temperature Sensor

DHT22 Wired (AM2302) Humidity and Temperature Sensor

Posted On June 25, 2019 at 6:43 am by / Comments Off on DHT22 Wired (AM2302) Humidity and Temperature Sensor


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.


Power supply3.3-5.5V DC
Output signaldigital signal via 1-wire bus
Sensing elementPolymer humidity capacitor
Operating rangehumidity 0-100%RH; temperature -40~80Celsius
Accuracyhumidity +-2%RH(Max +-5%RH); temperature +-0.5Celsius
Resolution or sensitivityhumidity 0.1%RH; temperature 0.1Celsius
Repeatabilityhumidity +-1%RH; temperature +-0.2Celsius
Humidity hysteresis+-0.3%RH
Long-term Stability+-0.5%RH/year
Interchangeabilityfully interchangeable