Sensor Breath Ethanol Detection MQ3 for 51 Description A compact ethanol gas sensor module built around the MQ3 sensing element for breath alcohol detection and alcohol vapor monitoring. Designed for straightforward integration with 51 microcontrollers and common development boards, the module provides responsive signals for both analog monitoring and threshold detection. Key benefits Detects ethanol vapor reliably: provides a dedicated sensor element tuned for ethanol to help systems recognize alcohol presence in air samples. Easy integration with microcontrollers: standard header pins and simple signal outputs let you connect the module quickly to 51 series controllers and other development platforms. Simple threshold control: onboard adjustment lets you set a digital trigger point for automatic alerts or interlock actions without complex programming. Space efficient and durable: compact module footprint fits into prototypes and embedded projects while the sensor housing and PCB are suitable for workshop and lab use. Features and attributes Function: breath and ethanol vapor detection for use in monitoring and control applications. Compatibility: made for use with 51 microcontrollers and compatible with most microcontroller development boards supporting analog or digital inputs. Size and form factor: compact PCB module with standard 3 or 4 pin header layout for VCC, GND, analog output, and digital output. Material and build: PCB mounted sensor element with a protective housing and potentiometer for sensitivity adjustment. Performance: responsive to changes in ethanol concentration and suitable for real time monitoring; provides both continuous analog output for measurement and a digital output for threshold detection. Power: designed to be driven from a typical 5 V supply used in microcontroller projects. How it solves common problems Reduces development time by offering a ready to use sensor module rather than building a detection circuit from discrete parts. Simplifies system logic by offering both analog readings for measurement and a digital trigger for event driven control. Allows tuning to the specific environment through the onboard adjustment for reliable detection without repeated hardware changes. Typical applications Prototype breath alcohol detectors driven by 51 microcontrollers for learning, testing, and proof of concept. Alcohol vapor monitoring in workshops or labs to detect the presence of ethanol vapors during processing or testing. Integration into control systems that require a digital trigger when ethanol concentration exceeds a set threshold. What you get A ready to connect MQ3 based ethanol detection module with header pins and onboard sensitivity adjustment for fast prototyping and integration.