The DHT22 (AM2302) Digital Temperature and Humidity Sensor Module is a high-performance sensor that delivers accurate, reliable, and stable measurements for a wide range of applications. Built with a capacitive humidity sensing element and an NTC temperature measuring element, the DHT22 offers superior performance compared to the DHT11, making it an excellent choice for IoT, automation, and weather monitoring projects.

Each sensor is factory-calibrated in a precision humidity chamber, with the calibration data stored in OTP memory, ensuring consistent accuracy. It communicates with microcontrollers like Arduino, ESP32, ESP8266, Raspberry Pi, and other platforms through a single-wire digital interface, making integration simple and efficient.

Thanks to its low power consumption, long communication distance, and strong anti-interference ability, the AM2302 sensor is suitable for professional and hobbyist projects in Sri Lanka, including HVAC systems, medical equipment, weather stations, smart homes, agriculture, and humidity control systems.

Key Features & Specifications:

Temperature measurement range: -40°C to +80°C

Humidity measurement range: 0% – 99.9% RH (0°C–50°C range)

Temperature accuracy: ±0.5°C (typical), ±1°C (max)

Humidity accuracy: ±2% RH

Working voltage: 3V – 5.5V

Resolution: 16-bit

Sampling period: Every 2 seconds

Output signal: Digital signal via single-bus interface

Sensing element: Polymer capacitor

Compact size & low power consumption

Applications in Sri Lanka:
✔️ Weather stations & data loggers
✔️ Smart homes & humidity control systems
✔️ HVAC & dehumidifiers
✔️ Consumer electronics & home appliances
✔️ Medical and industrial monitoring
✔️ IoT and automation projects

⚡ Why Buy the AM2302 / DHT22 in Sri Lanka?
✔️ High precision & reliability
✔️ Easy integration with Arduino, ESP32, Raspberry Pi
✔️ Better accuracy than DHT11
✔️ Ideal for long-term monitoring and automation