MQ-3B Alcohol Sensor – High-Precision Drunk Driving Detection

Professional-Grade Accuracy
Equipped with advanced semiconductor technology for reliable ethanol detection (0.05–10mg/L range), ensuring precise drunk driving tests with rapid response (＜10s).
Durable & Sensitive Probe
Features an aluminum oxide (Al₂O₃) ceramic substrate and gold-plated electrodes for corrosion resistance, extended lifespan (＞5 years), and stable performance in harsh environments.
Multi-Scene Safety Alerts
Ideal for car ignition locks, portable breathalyzers, industrial safety checks, and home sobriety monitoring with adjustable alarm thresholds (programmable via Arduino/Raspberry Pi).
Core-Only Flexibility
Compact bare-board design (32x20mm) allows DIY integration into custom projects, paired with low power consumption (＜750mW) for battery-operated devices.
Bulk-Order Optimized
Direct factory pricing for wholesale buyers – no middlemen. Ships globally with volume discounts on 50+ units.