NDIR Methane Sensor MH-441D-LOW

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MH-441D methane gas sensor is a general intelligent infrared gas sensor, which uses the principle of non-dispersive infrared (NDIR) to detect methane gas in the air, MH-411D has the advantages of no oxygen dependence and good selectivity. MH-441D is a compact and high-performance sensor that combines the mature infrared absorption gas detection technology with micro-machining and sophisticated circuit design. It is easy to use, can be directly used to replace catalytic combustion elements, and is widely used in various occasions where methane and explosive gases are present.


* High sensitivity, high resolution, low power consumption, Fast response time
* Output method: UART, analog voltage signal
* Temperature compensation, excellent linear output
* Excellent stability and long service life                        
* Anti-water vapor interference, no poisoning, can directly replace the catalytic combustion sensor 

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Specification Product Size

Technical Data Sheet

Model No. MH-441D
Detection Gas Methane (CH4)
Working Voltage 3.6~5.0VDC (Need to be powered by safety barrier)
Average Current <30mA
Interface Level 3.0V
Detection range 0~10%vol(selectable,  refer fig2.)
Output Signal UART(3.0V)
Warm-up time 3 min
Response time T90<30 seconds
Working Temperature -20°C ~ 60°C
Working Humidity 0~95%RH (no condensation)
Sizes Φ20×22.2mm
Weight 35g
Lifetime >5 years
Defense Grade IP54
Power, communication terminal Intrinsic safety Ui=7.5VDC,Ii=265mA,

Detection range and accuracy 

Detection Gas Formula Detection Range Resolution Decimal place Notes
Methane CH4 0~5.00% Vol 0.01% Vol 2 decimal places Temperature compensation
0~10.00% Vol 2 decimal places
100%LEL 1%LEL None



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As a pioneer in gas sensor based solutions with the advanced processes, technologies and products, Winsen offers a wide range of gas sensors:


As a pioneer in gas sensor based solutions with the advanced processes, technologies and products, Winsen offers a wide range of gas sensors:


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We have 17 sensor series, 200+ categories, and 300+ detection objects for gas detection. Such as CO, CO2, VOC, PM2.5, CH4, LPG and so on. In particular, we also have MEMS sensors. According to your industry application, gas principle, power consumption, accuracy, and range requirements, and we can select a specific model for you. You can also use the product filter below to choose a suitable product, or choose online serivce.

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Winsen is a factory with over 30,000 square meters area and 500+ production machines which is focusing on sensors development&manufacturing. It has strong R&D strength with more than 100 R&D personnel.

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1-7 days after received payment

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The warranty period is one year from the date of shipment. If the appearance of the product is not damaged, it can be returned after confirmation. For damage not caused by Winsen, the customer shall bear all maintenance costs.

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