MQ-3 Gas Sensor

DETECTION CAPABILITY: Specifically designed for detecting alcohol vapors such as ethanol, making it suitable for alcohol sensing and breath analysis applications
POWER SPECIFICATIONS: Operates with a standard +5V DC supply, ensuring compatibility with most microcontroller-based systems
INTERFACE DESIGN: Supports both analog and digital output modes, enabling flexible integration with embedded platforms and monitoring circuits
PIN CONFIGURATION: Provides a 4-pin interface including VCC (power), GND (ground), DO (digital output), and AO (analog output) for straightforward system connectivity
OUTPUT CHARACTERISTICS: The analog output ranges from 0–5V, where the output voltage increases proportionally with the concentration of detected alcohol gas
STATUS INDICATION: Equipped with an onboard LED indicator that lights up when gas presence is detected, offering quick visual feedback during operation
SENSITIVITY CONTROL: Includes an adjustable potentiometer that allows users to set the digital detection threshold based on required sensitivity levels
APPLICATION SCOPE: Commonly used in alcohol detection systems, breath analyzer devices, industrial safety monitoring, smart vehicle safety systems, and gas sensing research projects