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Description
Features :
| CATEGORY | SPECIFICATIONS |
|---|---|
| Product Type | Hydrogen (H₂) Gas Sensor Module |
| Model / Sensor Type | MQ-8 (SnO₂ gas sensing element) |
| Detection Gas | Hydrogen (H₂), hydrogen-containing gases |
| Detection Range | 100 – 1000 ppm |
| Operating Principle | Tin dioxide (SnO₂) conductivity increases with hydrogen gas concentration |
| Operating Voltage | DC 5 V |
| Power Consumption | ~150 mA (heater required) |
| Output Types | Analog (AO) + Digital (DO / TTL) |
| Digital Output (DO) | TTL signal (LOW when gas detected, HIGH otherwise) |
| Analog Output (AO) | 0.1–0.3 V baseline, up to ~4 V at high gas concentration |
| Sensitivity | High sensitivity to hydrogen gas |
| Selectivity | Good response to hydrogen-containing gases |
| Interference Resistance | Not easily affected by ethanol vapor, smoke, or carbon monoxide |
| Response Characteristics | Fast response and recovery time |
| Warm-up Time | ~20 seconds (heater stabilization required) |
| Operating Behavior | Gas concentration ↑ → conductivity ↑ → output signal ↑ |
| Physical Size | 32 mm × 20 mm × 22 mm |
| Mounting Features | 4 screw holes for easy installation |
| Indicator System | Power LED + digital output indicator LED |
| Stability | Long service life, reliable and stable operation |
| Internal Components | SnO₂ sensing layer + heating coil + signal conditioning circuit |
| Controller Reference Chip | AT89S52 (module-level reference) |
| Communication Mentioned | UART 9600 (system-level integration reference) |
| Applications | Hydrogen leak detection, industrial safety systems, gas monitoring equipment, smart home safety systems, laboratory environments |
Package Includes:
1 x MQ-8 Gas Sensor Module
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