MQ-136 Gas Sensor (Hydrogen Sulfide Detection)

The MQ-136 Gas Sensor is designed to detect hydrogen sulfide (H₂S), a toxic and corrosive gas commonly found in industrial and waste environments. It features high sensitivity and stability, making it suitable for safety systems in oil refineries, sewage treatment plants, and chemical industries. The sensor ensures early warning of hazardous gas leaks, helping maintain safe working conditions.
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  • All MQ sensors use SnO₂ semiconductor technology with resistance varying according to gas concentration.
  • Typical detection ranges: 10 ppm to 10,000 ppm depending on the gas type.
  • Require preheating (20–60 seconds or more) for stable readings.
  • Provide analog output + digital threshold output (via comparator board).
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