Target: Methane(CH4)
Model: MH-L1141A-U-100L
Detection range: 0~100%LEL
Detection principle: Laser spectral absorption
Characteristics: High Sensitivity and resolution, low power consumption, small size
Response time: 10~15S

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MH-L1141A-U-100L The integrated point laser methane sensor uses tunable laser spectral absorption (TDLAS) technology to accurately measure the target gas. The sensor probe integrates advanced lasers and detectors to achieve a compact integrated package with high precision, high density and high reliability. The sensor adopts the open gas exchange mode and adopts the unique technology to ensure the photoelectric division and ensure the intrinsic safety of the sensor. The sensor adopts excellent optical system and excellent algorithm to achieve accurate measurement, which ensures the advantages of high detection accuracy, fast response and low power consumption.


  • Petroleum, Chemical Industry, Mining.
  • Natural gas pipelines, transmission stations and filling stations.
  • Coal mine safety monitoring.
  • Pipeline leak monitoring and domestic natural gas leak monitoring;
  • Underground integrated pipe gallery, gas leakage monitoring, biogas monitoring.
  • Other related safety supervision and testing fields.


  • High Sensitivity and resolution, low power consumption, small size
  • Long effective absorption path, effective path length up to 9cm
  • High reliability, intrinsic anti-interference (no reaction of non-target gas)
  • Wide voltage (3.3V~5.0V)
  • TTL serial port output, convenient for secondary integration
  • Safety explosion-proof design, EMC protection design
  • Water-proof and dust-proof


Target Gas Methane(CH4)
Principle Laser
Working voltage 3.3V~5.0V(typical value:3.6V)
Working current 50mA~200mA(typical value:50mA)
Startingcurrent 250mA~320mA(typical value:250mA)
Measuring range 0~100%LEL
response time 10~15S
Minimumresolution 0.01%VOL
Working temperature -40℃~60℃
Working humidity <98%RH(non-condensing)
Working pressure 80Kpa~116Kpa
Storage temperature -40℃~85℃
Indication error NPT(normal pressure and temperature):±3%LEL All working conditions:±7LEL
Life Span >3years
Communication interface TTL
Signal output frequency 0.5Hz
Housingmaterial Stainless steel
Certification Explosive-proof certification
Size Diameter*Height:35mm*64mm

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

Technical Support:

Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.

The sensors don't have sleeping mode. It can be set in program if needed.

All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.

The sensor has been fully tested (not calibrated) before leaving the factory. However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.

15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.

Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.

Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.

Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to

Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.