MQ-3酒精乙醇传感器模块 酒精气敏检测报警
产品概述
MQ-3酒精乙醇传感器模块是一款高灵敏度气体检测模块，专为酒精（乙醇）蒸汽检测设计。该模块采用二氧化锡（SnO2）半导体气敏材料，能够在清洁空气中保持低电导率，当环境中存在酒精蒸汽时，电导率随浓度增加而升高，从而实现对酒精浓度的有效检测。模块具备双路信号输出（模拟量AO和数字量DO），可灵活接入单片机或继电器系统，适用于机动车驾驶人员检测、工业安全监测等场景。模块外形紧凑（尺寸约35.5×22.5×23mm），配备螺丝孔便于安装，且具有快速的响应恢复特性与长期稳定性。1813
技术特点
模块核心特性包括：
- 双信号输出：模拟量AO输出0~5V电压（浓度越高电压越高），数字量DO输出TTL低电平信号（可直接驱动单片机或继电器）。
- 高灵敏度与选择性：对乙醇蒸汽响应优异，抗汽油、烟雾及水蒸气干扰。
- 稳定可靠：预热20秒后数据稳定，内置电热丝正常工作时会轻微发热（异常高温需检查）。
- 易用性：提供电源指示灯和信号输出指示灯，支持通过电位器调节阈值。2324
应用场景
广泛用于酒驾排查、工业乙醇泄漏监测、智能家居安全系统等。例如，通过连接单片机可实现浓度超标声光报警；模拟量输出可配合ADC转换器实现实时浓度显示。模块兼容Arduino、STM32等开发平台，适合教育实验与项目开发。4527
Product Overview
The MQ-3 Alcohol Ethanol Sensor Module is a highly sensitive gas detection module designed for ethanol vapor monitoring. Utilizing tin dioxide (SnO2) semiconductor technology, the module maintains low conductivity in clean air, while its conductivity increases proportionally with alcohol concentration. It features dual output modes (analog AO and digital DO) for seamless integration with microcontrollers or relay systems, making it ideal for applications such as drunk driving prevention and industrial safety checks. With a compact design (35.5×22.5×23mm) and mounting holes, the module ensures rapid response and long-term reliability.1813
Key Features
- Dual Output Options: Analog AO outputs 0~5V voltage (scaling with concentration), while digital DO provides TTL low-level signals for direct control.
- High Sensitivity & Selectivity: Optimized for ethanol detection with minimal interference from gasoline, smoke, or humidity.
- Stable Performance: Requires 20-second preheating for stable readings; mild heating during operation is normal.
- User-Friendly: Includes power and signal indicators, with adjustable thresholds via potentiometer.2324
Applications
Suitable for diverse scenarios:
- Transportation: Integrated into breathalyzers for real-time alcohol detection.
- Industrial Safety: Monitors ethanol leaks in factories or storage areas.
- Smart Devices: Compatible with Arduino/STM32 for educational or DIY projects, enabling functions like LCD displays or audible alarms.4527
MQ-3酒精乙醇传感器模块 酒精气敏检测报警
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