DHT22 Temperature and humidity sensor AM2302

Description

The DHT22 is a highly precise temperature and relative humidity sensor. The sensor is factory calibrated therefore easy to interface with the microcontrollers. It come as a 4-pin package.  It is only 3 pins out of the four that are usable. The DHT22 can measure temperature from -40° C to 80° C and humidity from 0 % to 100 %. The accuracy of  the sensor are ±1° C and ±1 % respectively. It is highly stable with low power consumptions. The sensor is temperature compensated.

Specifications 

• Operating voltage of 3.5 V to 5.5 V
• Operating current of  0.3 mA
• A standby current of 60 uA
• Digital signal output
• Average sensing period of 2 s
• Longer transmission distance
• Measurable temperature range of -40° C to 80° C
• Measurable humidity range of 0 % to 100 %
• Temperature accuracy of ±0.5° C
• Humidity accuracy of ±1 %

Applications 

• Greenhouses
• Local weather station
• Environment conditions monitoring

DHT22 Datasheet

DHT22 Module