MC227D Catalytic Flammable Gas Sensor

  • • Bridge output voltage in linear
  • • Fast response
  • • Good repeatability and selectivity
  • • Good stability and reliability
  • • Resist H2S poisoning & organosilicone

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  • Principle Introduction
Principle Introduction:
MC227D adopts catalytic combustion principle, and its two arms of electric bridge consists of a test element and a compensate element. The resistance of the test element rises once it meets the combustible gases, in the same time, the output voltage of the bridge changes and the voltage variation rises in direct proportion to the gas concentration. The compensate element, as a conference, has the function of compensating temperature and humidity.
Applications :
It is widely used in public places (not industrial occasion) to detect the concentration or leakage of combustible gases such as natural gas, LPG, coal gas.
Technical parameters :

Tips:For more parameter information, please refer to the latest manual provided by salesman.



Sensor Type

Catalytic Type

Standard Encapsulation

Plastic base & metal cap

Working voltage(V)


Working current(mA)


Sensitivity (mV)

20%LEL CH4


20%LEL C3H8




Measuring range(%LEL)


Response Time (90%)


Recovery Time (90%)


Working Environment

-40~+70℃ <95%RH

Storage Environment

-20~+70℃ <95%RH


5 years

Reference Circuit :

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