The DHT11 Digital Temperature and Humidity Sensor delivers accurate environmental monitoring for Arduino projects, home automation systems, and IoT applications. This factory-calibrated sensor combines a capacitive humidity sensor with a thermistor to provide reliable digital readings.
DHT11 Sensor Key Features:
- Dual Measurement Capability: Monitors both temperature and humidity with a single compact sensor module.
- Arduino Compatible: Works seamlessly with Arduino boards and other microcontrollers via simple 3-pin interface.
- Digital Output: Provides direct digital readings without requiring analog input pins on your microcontroller.
- Factory Calibrated: Pre-calibrated at the factory for consistent, accurate measurements out of the box.
- Wide Operating Range: Temperature measurement from 0°C to 50°C and humidity detection from 20% to 90% RH.
- Low Power Consumption: Draws only 2.5mA during active data conversion, ideal for battery-powered projects.
- Flexible Voltage: Operates on 3.3V to 5.5V, compatible with most development boards and electronic systems.
- Easy Integration: Compatible with DHTLib library for Arduino, providing ready-to-use functions for data retrieval.
Technical Specifications:
- Humidity Range: 20-90% RH with ±5% RH accuracy
- Temperature Range: 0-50°C with ±2°C accuracy
- Sensing Method: Capacitive humidity sensor with thermistor for temperature
- Detection Principle: Measures water vapor by assessing electrical resistance between two electrodes
- Sampling Rate: Data retrieval recommended once every 2 seconds for optimal performance
- Operating Voltage: 3.5V to 5.5V
- Current Draw: 2.5mA maximum during conversion
- Pin Configuration: 4 pins – VCC, Data, NC (not connected), and Ground
- Output Type: Digital signal via single-wire serial interface
Applications:
The DHT11 sensor suits a wide range of projects including home automation systems, greenhouse monitoring, weather stations, HVAC control systems, humidifier/dehumidifier control, and environmental data logging. Its compact size and low cost make it ideal for DIY electronics projects, educational purposes, and prototyping.
Arduino Setup: Install the DHTLib library to access all functions needed for reading humidity and temperature data from the sensor. The library simplifies integration and provides example code to get your project running quickly.
