MQ-136-Hydrogen Sulfide Gas Sensor

SKU: VM00872

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MQ136 Gas Sensor monitors the concentration of Hydrogen Sulfide gas. This Module sensor provides a digital and analog output. You can interface the sensor with Microcontrollers like Arduino to get the readings.

Technical Specification:

  • Circuit voltage: 5V±0.1
  • Heating voltage: 5V±0.1
  • Load resistance: can adjust
  • Heater resistance: 31Ω±5%
  • Heating consumption: less than 800mw
  • Sensing Resistance: 30KΩ - 200KΩ (10ppm H2S)
  • Temp: 20℃±2℃ Vc:5V±0.1
  • Humidity: 65%±5% Vh: 5V±0.1
  • Size: 32mm*22mm*27mm (L*W*H)


  • Dual signal output (analog output and TTL level output)
  • The TTL output effective signal is low. (The signal light is on when the output is low and can be directly connected to the microcontroller)
  • Analog output 0 ~ 5V voltage, the higher the concentration the higher the voltage.
  • Good sensitivity to hydrogen sulfide, liquefied gas, natural gas, city gas, and smoke.
  • with long service life and reliable stability
  • fast response recovery characteristics
  • Good sensitivity to Hydrogen sulfide
  • Long life and low cost
  • Simple drive circuit


  • Can be used in air quality control equipments for buildings/offices which are suitable for detecting of H2S

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