DHT22 AM2302 Digital Temperature and Humidity Sensor (Aosong Environmental Sensor)

The DHT22 AM2302 Digital Temperature and Humidity Sensor from Aosong is a digital environmental sensor designed for temperature and relative humidity measurement in embedded systems, IoT devices, weather monitoring, and automation projects. It integrates a polymer capacitor humidity sensing element and temperature sensing element with calibrated digital output through a single-bus interface.

Key Features -

• Digital temperature and humidity measurement

• Manufactured by Aosong

• Single-bus digital communication interface

• Polymer capacitor humidity sensing element

• High-resolution measurement output

• Calibrated digital signal

• Stable long-term measurement performance

• Compatible with Arduino, ESP32 and Raspberry Pi platforms

• Suitable for environmental monitoring applications

Specifications -

• Product Type: Digital Temperature and Humidity Sensor

• Model: DHT22 / AM2302

• Brand: Aosong

• Power Supply: 3.3V to 6V DC

• Humidity Measurement Range: 0 percent RH to 100 percent RH

• Temperature Measurement Range: -40 C to 80 C

• Humidity Resolution: 0.1 percent RH

• Temperature Resolution: 0.1 C

• Humidity Accuracy: 2 percent RH typical, 5 percent RH maximum

• Temperature Accuracy: 0.5 C typical

• Humidity Repeatability: 1 percent RH

• Temperature Repeatability: 0.2 C

• Humidity Hysteresis: 0.3 percent RH

• Long Term Stability: 0.5 percent RH per year

• Sensing Element: Polymer Capacitor

• Sampling Period: 2 seconds average

• Output Signal: Single Bus Digital Signal

• Interface Type: Single Bus Digital Communication

Applications -

• Weather monitoring systems

• Temperature and humidity monitoring

• HVAC monitoring

• Smart home systems

• IoT environmental monitoring

• Arduino projects

• ESP32 projects

• Raspberry Pi projects

• Data logging systems

• Industrial environmental monitoring