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DHT22 Temperature & Humidity Sensor Module

  • Supply Voltage: 5V
  • Temperature Range: -40°C to 80°C
  • Temperature Resolution: 0.1°C
  • Temperature Accuracy: < ±0.5°C
  • Humidity Range: 0–100% RH
  • Humidity Resolution: 0.1% RH
  • Humidity Accuracy: ±2% RH
  • Interface Pins: VCC, GND, S
  • Module Size: 38 × 20 mm
Description
  • The DHT22 is a high-precision digital sensor designed for accurate temperature and humidity measurement.
  • Widely used in weather stations, climate control systems, smart homes, and environmental monitoring projects.
  • Provides digital output, allowing easy interfacing with microcontrollers including Arduino, Raspberry Pi, ESP32, and ESP8266.
  • Offers superior accuracy compared to the DHT11, with ±0.5°C temperature accuracy and ±2%RH humidity accuracy.
  • Features 0.1-level resolution for both temperature and humidity, ideal for detailed monitoring applications.
  • Operates on 3.3V to 6V and consumes only about 1mA during measurement, making it suitable for low-power applications.
  • Uses a single-wire communication protocol, simplifying circuit connections.
  • Typical response time is approximately 2 seconds, ensuring reliable real-time environmental readings.
  • Usually integrated into a compact PCB mount for easy connectivity and stable operation.

PACKAGE INCLUDES:
  • 1 × DHT22 Sensor
  • 1 × Analog Sensor Cable
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Applications
  • Weather Stations
  • Climate Control Systems
  • Indoor Air Quality Monitoring
  • Greenhouses
  • Smart Home Automation
  • Data Logging Devices
  • DIY Electronics Projects
  • Industrial Environment Monitoring
  • Health and Comfort Monitoring
  • Educational and Research Projects
TECHNICAL SPECIFICATIONS
Specification Value
Input Voltage 5V
Wiring Map VCC, GND, S
Operating Temperature -40°C to 80°C
Humidity Range 0–100% RH
Temperature Resolution 0.1°C
Humidity Resolution 0.1% RH
Temperature Accuracy < ±0.5°C
Humidity Accuracy ±2% RH
Sensor Dimensions 38 × 20 mm
Shipping Weight 0.02 kg
Shipping Dimensions 6 × 3 × 1 cm
Datasheet

DHT22 Datasheet