DHT22 Temperature Humidity Sensor Module

The DHT22 Temperature and Humidity Sensor is a reliable and widely used module for accurate measurement of environmental conditions. It is one of the most popular sensors for temperature and humidity in DIY electronics, IoT systems, weather stations, and automation projects. With high precision, stability, and a wide operating range, the DHT22 is ideal for both beginners and professionals.

DHT22 Features

• 3.3V – 5V Input (wide voltage compatibility)
• 1–1.5mA measuring current
• 40–50 µA standby current
• Humidity range: 0–100% RH
• Temperature range: -20°C to 80°C
• Accuracy: ±2% RH (humidity) and ±0.5°C (temperature)
• Digital output for easy microcontroller interfacing

DHT22 Pin Mapping

When the DHT22 sensor is kept facing you, the left-most pin is Pin 1:

• Pin 1 (VCC): Power supply (3.5V to 5.5V)
• Pin 2 (Data): Outputs both temperature and humidity through serial data
• Pin 3 (NC): Not connected
• Pin 4 (GND): Connected to the ground

For the DHT22 module (with PCB), the pins are:

• Pin 1 (VCC): Power supply 3.5V to 5.5V
• Pin 2 (Data): Serial data output
• Pin 3 (GND): Ground connection

DHT22 Technical Specifications

• Operating Voltage: 3.5V to 5.5V
• Operating Current: 0.3mA (measuring), 60µA (standby)
• Output: Serial digital data
• Temperature Range: -40°C to 80°C
• Humidity Range: 0% to 100%
• Resolution: 16-bit (Temperature & Humidity)
• Accuracy: ±0.5°C (Temperature), ±1% (Humidity)

Temperature and Humidity Sensor Price in Pakistan

The temperature humidity sensor price in Pakistan varies depending on the supplier and packaging type (bare sensor or module). On average, the DHT22 sensor is priced between affordable ranges, making it one of the best sensors for temperature and humidity in academic, industrial, and IoT applications.