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Intelligent Methane (CH4) Gas Sensor 0~100% VOL - MH-741A

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• Power Supply: 4.5~5.5V DC
• Working Current: 120mA
• Interface Power: 5V
• Output: IIC 0.4V~2V
• Detected Range: 0~100%vol can be specified
• Response Time T90: <30s
• Temperature: -40°C ~70°C
• Humidity: 0~95%RH

Model Number: MH-741A

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Product Specification

Intelligent CH4 Gas Sensor MH-741A

MH-741A CH4 Gas sensor is a common intelligent sensor in small sized to detect CH4 in air taking advantages of non-dispersive infrared principle. It has the advantages of good selectivity, oxygen independence, stable performance and long life. MH-741A is an infrared gas sensor in small sized combining mature technology for infrared absorption detection and micro-machining, superior circuit design closely. The sensor can be widely used in detection for fire disaster, explosive gases etc.

Explosion Proof: ExmbⅡCT4

MH-741A Intelligent CH4 Gas Sensor Characteristics
• High Sensitivity and resolution
• 5V constant power supply, low power consumption
• IIC and 0.4-2V analog voltage signal variety of output
• Fast response and resume
• Temperature compensation and excellent linear output
• Excellent stability
• Long life
• Anti-poisons, anti-vapor interference

MH-741A Intelligent CH4 Gas Sensor Specification

Power Supply	4.5~5.5V DC
Working Current	120mA
Interface Power	5V
Output	IIC 0.4V~2V
Detected Range	0~100%vol can be specified
Warm-up Time	90s
Response Time	T90 <30s
Repeatability	Zero < ±10ppm
Repeatability	SPAN <±30ppm
Long-time Drift	Zero < ±30ppm/month
Long-time Drift	SPAN < ±30ppm/month
Temperature	-40°C ~70°C
Humidity	0~95%RH
Life	>5 year
Explosion-proof	ExdmⅡCT4
Protection Class	IP54

MH-741A Intelligent CH4 Gas Sensor Detected gas and detected range

Detected Gas	Gas Formula	Sensor Type	Detected Range	Resolution	Remarks
Methane	CH4	HC	0~5%VOL	0.01%VOL	Temperature compensation
Methane	CH4	HC	0~10%VOL	0.01%VOL	Temperature compensation
Methane	CH4	HC	0~100%VOL	0.1%VOL	Temperature compensation
Propane	C3H8	HC	0~2.1%VOL	0.01%VOL	Temperature compensation
Propane	C3H8	HC	0~100%VOL	0.1%VOL	Temperature compensation
Methyl chloride	CH3CL	HC	0~8.1%VOL	0.01%VOL	Temperature compensation
Methyl chloride	CH3CL	HC	0~100%VOL	0. 1%VOL	Temperature compensation
Gasoline	C3-C12	HC	0~1.1%VOL	0.01%VOL	No temperature compensation
cyclopentane	C5H10	HC	0~1.4%VOL	0.01%VOL	No temperature compensation
cyclohexane	C6H12	HC	0~1.3%VOL	0.01%VOL	No temperature compensation
Methanol	CH3OH	HC	0~6.7%VOL	0.06%VOL	No temperature compensation
Acetylene	C2H2	HC	0~2.1%VOL	0.02%VOL	Temperature compensation
Methylene chloride	CH2CL2	HC	0~15%VOL	0.15%VOL	No temperature compensation
Benzene	C6H6	HC	0~1.2%VOL	0.012%VOL	No temperature compensation
Methylbenzene	C7H8	HC	0~1.2%VOL	0.012%VOL	No temperature compensation
Alcohol	C2H5OH	HC	0~3.3%VOL	0.033%VOL	No temperature compensation
ethylene oxide	C2H4O	HC	0~3.0%VOL	0.03%VOL	No temperature compensation
Epichlorohydrin	C3H5CLO	HC	0~3.8%VOL	0.038%VOL	No temperature compensation
Propylene	C3H6	HC	0~2.0%VOL	0.02%VOL	Temperature compensation
Ethylene	C2H4	HC	0~2.7%VOL	0.027%VOL	Temperature compensation
chloropropene	C3H5CL	HC	0~2.9%VOL	0.029%VOL	No temperature compensation
Pentane	C5H12	HC	0~1.7%VOL	0.017%VOL	No temperature compensation
Ethane	CH3CH3	HC	0~3.0%VOL	0.03%VOL	Temperature compensation
Ethyl acetate	C4H8O2	HC	0~2.0%VOL	0.02%VOL	No temperature compensation
Iso-butane	C4H10	HC	0~1.8%VOL	0.018%VOL	Temperature compensation