The DHT22 (AM2302) Digital Temperature & Humidity Sensor Module is a calibrated digital sensor that measures both ambient temperature and relative humidity over a single-wire digital output. It combines a capacitive humidity element and a precision thermistor with an onboard chip that performs the analog-to-digital conversion, making it a reliable choice for weather stations, greenhouses, and home-automation projects.
Key features:
- Wide Humidity Range: Measures relative humidity from 0% to 100% RH with an accuracy of ±2%.
- Wide Temperature Range: Reads temperatures from -40°C to +80°C with an accuracy of ±0.5°C.
- Digital Output: Communicates over a single-wire digital interface, requiring no analog input or external ADC.
- Factory Calibrated: Ships pre-calibrated for accurate readings straight out of the box.
- Low Power Consumption: Draws minimal current between readings, suitable for battery-powered monitoring.
- Long Cable Runs: The digital signal is more noise-resistant than an analog one, supporting cable runs up to 20 metres.
It is widely supported by Arduino, ESP8266/ESP32, and Raspberry Pi libraries, making it a straightforward upgrade from the lower-precision DHT11 for serious environmental-monitoring projects.
Pick up from the Woodmart Store
Courier delivery
DHL Courier delivery
