Semiconductor H2S gas sensor – MQ136 sulfuretted hydrogen sensor


Semiconductor H2S gas sensor Introduction

Semiconductor H2S gas sensor is a hydrogen sulfide sensor using solid oxide semiconductor sensing technology.  gas sensor is mainly used to detect hydrogen sulfide gas in the concentration range of 1~200PPM. It has the advantages of small size, high sensitivity, high performance chip, significantly improved product performance, long life, low cost, simple driving circuit and so on. Hydrogen sulfide sensor is a low cost semiconductor gas sensor suitable for many applications.

Semiconductor H2S gas sensor

Semiconductor H2S gas sensor Features

1, the machine is small in size, light in weight, easy to install, can be mounted in portable, fixed, pipe type and other appearance sensors used.

2, stainless steel protective net, high protection, easy to clean effective protection from particulate matter and impurities, easy to maintain and use.

3, high-performance chip, breakthrough manufacturing process, product performance significantly improved.

4, long service life, low cost, simple driving circuit.

5, high resolution, high sensitivity, fast response speed, strong anti-interference force.

MQ136 sulfuretted hydrogen sensor

Semiconductor H2S gas sensor Parameters

Product number:MQ-136

Product type:Semiconductor gas sensor

Standard package:Plastic package

Detection gas:Hydrogen sulfide

Detection concentration:1~200ppm hydrogen sulfide

Loop voltage:≤24V DC

Load Resistance:Adjustable

Temperature humidity:20°C+2°C ; 55%+5%RH


1. Avoid exposure to volatile silica vapors.

2, avoid sensor exposure to high concentration of corrosive gas.

3, avoid alkali, alkali metal salt, halogen pollution.

4, avoid the sensor contact with water or immersed in water, easy to cause the sensor sensitivity characteristics decline.

5, avoid applying too high voltage, if the voltage applied to the sensor heating is higher than the specified value, even if the sensor has not received physical damage or damage, it will cause damage to the lead/or heater, and cause the sensor sensitive characteristics to decline.

sulfuretted hydrogen sensor


What is hydrogen sulfide gas?

Hydrogen sulfide is an inorganic compound with a molecular weight of 34.076. It is soluble in water with a melting point of -85.5 ℃ and a boiling point of -60.4 ℃. Under standard conditions, hydrogen sulfide is a flammable acid gas with no color and a rotten egg odor at low concentrations.

What is a hydrogen sulfide sensor?

Hydrogen sulfide gas sensor is a gas sensor designed to detect hydrogen sulfide. Hydrogen sulfide is a colorless flammable gas with a special smell of rotten eggs. It is irritating and asphyxiating, and has great harm to human body. At present, the colorimetric method and gas chromatography are mostly used to determine hydrogen sulfide in air.

Why test for hydrogen sulfide?

Hydrogen sulfide is mainly produced in municipal sewage pipes, manure tanks, mines, pulp mills…. Where the air is not circulating, the lack of ventilation leads to the continuous accumulation of hydrogen sulfide gas, which leads to the rising concentration of conditions. That’s why there are so many cases of grief.


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