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DHT22/AM2302 Digital Temperature and Humidity Sensor

Reference: SR0044

Condition: New product

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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 14185.5mm; big size 22285mm