DHT22/AM2302 Digital Temperature and Humidity Sensor

SR0044

New product

6,500 Ks

More info

Detail about DHT22

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 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(20m) enable DHT22 to be suited in all kinds of harsh application occasions.Single-row packaged with four pins, making the connection very convenient.

 Features

  • Full range temperature compensated
  • Relative humidity and temperature measurement
  • Calibrated digital signal 
  • Outstanding long-term stability 
  • Extra components not needed
  • Long transmission distance 
  • Low power consumption 
  • 4 pins packaged and fully interchangeable

Specifications

Model

DHT22

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

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