DHT 22 Temperature and Humidity Sensor

DHT22 Temperature and Humidity Sensor

The DHT22 (also known as AM2302) is a high-accuracy digital sensor designed to measure temperature and humidity. It provides calibrated digital output, making it ideal for reliable environmental monitoring in embedded systems and IoT applications.

Key Features

• High Accuracy Sensor: Better precision than DHT11
• Digital Output Signal: No need for analog conversion
• Wide Measurement Range: Suitable for various environments
• Stable and Reliable: Factory-calibrated for consistent readings
• Low Power Consumption: Suitable for battery-powered devices
• Easy Interface: Works with Arduino, ESP32, and other microcontrollers

Applications

• Weather Monitoring Systems: Temperature and humidity tracking
• IoT Projects: Environmental sensing and automation
• Home Automation: Smart climate control systems
• Agriculture: Greenhouse monitoring
• DIY Electronics: Data logging and experiments

Technical Specifications

• Model: DHT22 / AM2302
• Operating Voltage: 3.3V–6V
• Temperature Range: -40°C to +80°C
• Temperature Accuracy: ±0.5°C
• Humidity Range: 0–100% RH
• Humidity Accuracy: ±2% to ±5% RH
• Output Type: Digital (single-wire protocol)
• Sampling Rate: ~0.5 Hz (1 reading every 2 seconds)

Product Example

DHT22 Temperature & Humidity Sensor (AM2302)
High-precision sensor for accurate environmental monitoring in embedded and IoT applications.

Why Choose DHT22?

Compared to basic sensors like DHT11, the DHT22 offers higher accuracy, a wider measurement range, and better reliability. It is an excellent choice for applications that require precise environmental data.