Target: Methane CH4
Model: MH-Z9041A
Detection range: 3-100%LEL (can be customized)
Detection principle: TDLAS
Characteristics: Resistance to water vapor, no poisoning, Response to CH4 gas only, no response to other gases
Size: 76.5mmX21mmX14.1mm
Output signal: Serial port (UART) (TTL level 3.0V)
Response time: T90< 15s

Get Price Whatsapp


MH-Z9041A laser CH4 gas sensor (hereinafter referred to as the sensor) is a domestic methane sensor, based on tunable laser gas absorption technology (TDLAS) technology to detect methane gas, internal use of cross-beam light path structure, with excellent gas selectivity, no oxygen dependence, water vapor resistance. Anti-poisoning, long life, etc. Built-in temperature control algorithm, temperature compensation algorithm, to achieve accurate measurement of methane gas; With serial port output interface, easy to use. The sensor is a high performance sensor which combines mature laser gas absorption detection technology with stable optical path design and circuit design.


 Methane gas alarm for home use


  • Resistance to water vapor, no poisoning
  • Response to CH4 gas only, no response to other gases
  • No need calibration, long lifespan
  • High accuracy, resolution can reach 0.1%LEL
  • UART output way


Model No. MH-Z9041A
Detection Gas Methane CH4
Power supply DC (3.2-3.6) V
Working current <300mA
Interface level 3.0V
Detection Range 3-100%LEL (can be customized)
Detection Accuracy ±3%LEL @25℃
Output signal Serial port (UART) (TTL level 3.0V)
Warm-up time 15s
Response time T90< 15s
Working conditions -13~58℃① 0-95%RH(no condensation)  80kpa~116kpa
Storage temperature -20~60℃
Size 76.5mmX21mmX14.1mm
Weight < 20g
Life > 10 years
Detection range and accuracy
Gas Name chemical formula Detection Range Resolution Accuracy
Methane CH4 3-50.00%LEL 0.1%LEL 3-50.00%LEL: ±(3%LEL)@25℃ >50.00%LEL:±(5%LEL)@25℃
Methane CH4 3-100.00%LEL 0.1%LEL ±(3%LEL)@25℃

* 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.