DHT22 Humidity and Temperature Sensor Module (AM2302)

DHT22 Humidity and Temperature Sensor Module

The DHT22 Sensor Module is a high-precision digital temperature and humidity sensor designed for reliable environmental monitoring. This low-cost, easy-to-use sensor is ideal for IoT, weather stations, HVAC systems, and home automation projects.

Using a capacitive humidity sensor and thermistor, the DHT22 accurately measures ambient temperature and humidity, providing a calibrated digital signal through a single data pin — no analog input required.

Key Features:

• High Accuracy: Measures both humidity and temperature with exceptional precision.

• Digital Output: No need for analog pins; simple digital signal via data pin.

• Calibrated Signal: Factory-calibrated for accurate and stable measurements.

• Low Power Consumption: Energy-efficient operation ideal for battery-powered devices.

• Long-Distance Transmission: Reliable signal over extended cable lengths.

• Easy Installation: Just connect to 3–5V power, data input, and ground.

Specifications:

• Operating Voltage: 3V to 5V

• Signal Type: Digital

• Sampling Rate: 1 reading every 2 seconds

• Humidity Range: 0–100% RH

• Temperature Range: –40°C to +80°C

• Pins: 4-pin packaged module

Applications:

• HVAC systems

• Dehumidifiers

• Testing & inspection equipment

• Consumer electronics

• Automotive automation

• Data loggers

• Weather stations

• Home appliances

• Humidity control systems

• Medical devices

Why Choose DHT22 Sensor?

The DHT22 offers a perfect balance of accuracy, stability, and affordability, making it one of the most popular IoT sensors for environmental monitoring. It’s fully interchangeable, requires no extra components, and ensures long-term reliable performance.