NDIR Infrared Combustible Gas Sensor MH-741A/C3H8 Sensing

  • • Detection Range: 0~100%VOL optional, methane, CH4
  • • Output: analog voltage, IIC
  • • Application: industrial-process control and safety protection, agriculture and animal husbandry, NDIR Combustible Gas Detection/C3H8 Sensing

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  • Principle Introduction
Principle Introduction:


Target Gas:Flammable Gas

Measurement Range:0~100%VOL optional 

Output Signal:IIC

MH-741A, NDIR CH4 Gas Sensor, is a universal type intelligent sensor to detect CH4 gas,taking advantage of non-dispersive infrared (NDIR) principle. With high selectivity, no oxygen dependence, high performance and long lifespan features, MH-741A also has built-in temperature compensation feature. MH-741A is a compact and high-performance sensor based on infrared absorption of gas detection technology, micro-machining and sophisticated circuit design


Applications :

Widely used for HVAC refrigeration, air monitoring indoor, industrial-process control and safety protection, agriculture and animal husbandry.

Technical parameters :

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

Product Model MH-741A
Gas Detected Flammable Gas
Working Voltage 4.5 V ~ 5.5V DC
Average Current < 100mA
Interface Level 3.3V
Measurement Range 0~100%VOL optional
Output Signal IIC
0.4-2V DC
Warm-up Time 3min
Response Time T90 < 30s
Working Temperature -40℃ ~ 70℃
Working Humidity 0 to 95%RH, non-condensing
Dimension Φ44×61mm
Weight 350g
Lifespan >5 years
Ex-marking Ex d ⅡC T6 Gb
Protected Class IP65

Reference Circuit :

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