Ethanol Detector Gas Sensor Module for MQ3 Sensor Product overview This compact sensor board is built to work with the MQ3 alcohol sensor for reliable detection of ethanol vapor in air. It provides both analog and digital outputs for easy integration into monitoring and prototype systems, and an onboard adjustment to set a digital threshold. Key benefits Ready to integrate: Standard signal outputs let you connect directly to microcontrollers or data acquisition systems for fast prototyping. Dual output options: Analog output gives proportional concentration readings; digital output provides a simple threshold switch for alarms or logic control. Adjustable sensitivity: Onboard potentiometer allows calibration of the digital trigger point to match your application needs. Compact and easy to use: Small PCB form factor makes it simple to mount or incorporate into custom housings and test rigs. Practical for projects: Suited to education, development, and smallscale monitoring tasks where detecting alcohol vapor is required. Function and compatibility Function: Detects ethanol and other alcohol vapors in air and converts the sensor response to analog and digital signals. Compatibility: Designed for use with MQ3 series sensors. Outputs are compatible with common microcontroller analog and digital inputs. Interface: Provides analog voltage output for concentration measurement and a digital output that changes state when the adjustable threshold is reached. Important attributes Size: Compact PCB module form factor for easy placement in prototypes and enclosures. Material: Includes a metal oxide semiconductor MQ3 sensing element mounted on a printed circuit board. Performance: Offers a responsive signal for breath and vapor detection tasks and an adjustable digital trigger for straightforward alarm or control integration. Controls: Onboard potentiometer for setting the digital output threshold; typical modules include indicator LED for digital output state. Typical applications DIY breath detection projects and educational demonstrations requiring a simple, direct sensor interface. Prototype interlock or control systems where a digital alarm or shutdown must be triggered when alcohol vapor exceeds a set level. Smallscale ambient monitoring for workshops, laboratories, or storage areas where alcohol vapor presence needs to be detected during experiments or processes. What you get A readytouse MQ3 compatible ethanol gas detector module that simplifies measurement and control tasks involving alcohol vapors. Clear analog and digital outputs plus an adjustable threshold for flexible application options. Notes on use Calibrate the digital threshold using the onboard potentiometer for the operating environment and desired sensitivity. Use appropriate signal conditioning or sampling methods when reading analog output with microcontrollers to obtain stable measurements. Avoid using this module as a substitute for certified instruments where regulatory or safety compliance is required.