DHT22 output calibrated digital signal. It utilizes exclusive digital-signal-collecting-technique and humidity
sensing technology, assuring its reliability and stability.Its sensing elements is connected with 8-bit single-chip
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(20m) enable DHT22 to be suited in all kinds of
harsh application occasions.
Single-row packaged with four pins, making the connection very convenient.
Power supply 3.3-6V DC
Output signal digital signal via single-bus
Sensing element Polymer capacitor
Operating range humidity 0-100%RH; temperature -40~80Celsius
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
Sensing period Average: 2s
Interchangeability fully interchangeable
Dimensions small size 14*18*5.5mm; big size 22*28*5mm