MQ3 Alcohol Sensor Module Dual Output Detection Adjustable Sensitivity for Arduino Breathalyzer Projects

MQ3 Alcohol Sensor Module Ethanol Gas Detection and Alarm A compact, easytointegrate MQ3 sensor module for detecting alcohol vapors. Designed for makers, engineers, and integrators who need a simple way to monitor ethanol and related gases and trigger alarms or record concentration readings. Key benefits Reliable alcohol vapor detection for monitoring and control applications. Dual output options: analog output for concentration measurement and digital alarm output for thresholdbased switching. Adjustable sensitivity: onboard potentiometer lets you set the alarm threshold without extra components. Easy integration: standard pinout and compact PCB fit on breadboards and connect directly to common microcontroller platforms. Lowpower operation and simple wiring make it suitable for prototypes and production prototypes. Core functions and attributes Function: Detects alcohol and ethanol vapors and provides both analog and digital signals for measurement and alarm functions. Compatibility: Designed to interface with common microcontrollers and development boards such as Arduino and Raspberry Pi using standard GPIO and ADC inputs. Power: Operates from a standard lowvoltage DC supply suitable for hobbyist and embedded systems. Interface: Typical module pinout includes power, ground, analog output, and digital alarm output for straightforward connections. Form factor and material: Compact PCB module with the MQ3 sensing element mounted on a breakout board for stable mounting and easy wiring. Performance: Sensitivity can be tuned via the onboard potentiometer; reliable detection behavior for ethanol and similar alcohol vapors in ambient conditions. Practical use scenarios DIY breathalyzer prototype: Use the analog output to estimate vapor concentration and the digital output to trigger visual or audible alerts when a set threshold is exceeded. Vehicle or equipment driver monitoring: Integrate the module into a sobrietycheck system that can trigger an alarm or interlock when alcohol vapor is detected. Workplace or production monitoring: Place the module near potential leak points to monitor for alcohol vapor presence and connect the digital output to local alarms or control systems. What you get MQ3 alcohol sensor module with sensing element and breakout PCB ready for wiring to microcontrollers and alarm circuits. Typical connections and setup Connect power and ground to the module, read the analog output for concentration information, and use the digital output as a threshold alarm. Adjust the onboard potentiometer to set the desired alarm point. This module provides a practical, lowcomplexity way to add alcohol vapor detection and alarm capability to prototypes and embedded systems while keeping wiring and setup straightforward.