DHT22/AM2302 Digital Temperature and Humidity Sensor – High Accuracy Climate Sensor for Arduino & Embedded Systems

Product Description:
The DHT22 (AM2302) Temperature and Humidity Sensor is a high-accuracy, low-cost digital sensor designed for precise environmental monitoring. Utilizing a capacitive humidity sensing element and a thermistor for temperature detection, this sensor delivers accurate, stable, and reliable digital data output, making it ideal for IoT, home automation, and weather monitoring applications.

Built with advanced materials and manufacturing techniques, the DHT22 offers excellent long-term stability and ultra-low power consumption. It transmits fully calibrated digital output through a single-wire interface, simplifying integration with popular microcontrollers like Arduino, ESP32, Raspberry Pi, and more.

The DHT22 provides precise humidity readings from 0–100% RH with ±2–5% accuracy and temperature measurements from -40°C to +80°C with ±0.5°C accuracy. With its digital output and compact design, it is widely used in industrial and consumer electronics for reliable temperature and humidity measurement.

Key Specifications:

• Model: DHT22 / AM2302

• Power Supply: 3.3V – 5.5V DC

• Humidity Range: 0% – 100% RH

• Humidity Accuracy: ±2% RH (Max ±5%)

• Temperature Range: -40°C to +80°C

• Temperature Accuracy: ±0.5°C

• Resolution: 0.1

• Output Signal: Digital (single-wire interface)

• Response Time: ≤2 seconds

• Dimensions: 33mm x 15.5mm x 8mm

• Weight: 3g

Features:

• High-accuracy digital humidity and temperature measurement

• Ultra-low power consumption

• Fully calibrated digital output – no external components required

• Long-distance signal transmission capability

• Compact and easy-to-use 4-pin package

• Excellent long-term stability and reliability

• Compatible with Arduino, ESP8266, ESP32, and Raspberry Pi

• Simple 3-wire connection for easy setup

• Replaces SHT10 sensors at a lower cost

Applications:

• HVAC systems and environmental control

• Weather stations and data loggers

• Smart home and IoT applications

• Medical and laboratory equipment

• Industrial process monitoring

• Consumer electronics and home appliances

• Agricultural and greenhouse automation

Package Includes:
1 × DHT22 / AM2302 Digital Temperature & Humidity Sensor