MQ-8 Hydrogen Gas Sensor

The MQ-8 Hydrogen Gas Sensor is a widely used gas sensor that detects hydrogen (H₂) gas concentrations in the air. It operates on the principle of chemiresistance, where its internal resistance changes when exposed to hydrogen gas.

Features of MQ-8 Sensor

✅ Detects Hydrogen Gas (H₂) – Primarily used to detect hydrogen leaks.
✅ Wide Detection Range – Typically detects hydrogen concentrations from 100 ppm to 10,000 ppm.
✅ Operating Voltage – Works on 5V DC power supply.
✅ Analog & Digital Output – Provides both analog (voltage variation) and digital (threshold-based) output.
✅ Preheat Time – Requires preheating (typically 24–48 hours) for stable operation.
✅ Sensitivity Adjustment – Potentiometer available to set sensitivity threshold.
✅ Applications – Used in hydrogen leak detection systems, industrial safety equipment, and fuel cell monitoring.