Target: Combustible gas(CH4)
Model: MH-T7042A
Detection range: 0~100%VOL optional
Detection principle: NDIR
Characteristics: High sensitivity, high resolution, low power consumption
Size: Φ51×65mm
Output signal: UART
Response time: T90 < 30s

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MH-T7042A 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-T7042A also has built-in temperature compensation feature. MH-T7042A is a compact and high-performance sensor based on infrared absorption of gas detection technology, micro-machining and sophisticated circuit design.


Widely used for industrial field instrumentation, industrial-process control and safety protection


  • High sensitivity, high resolution, low power consumption
  • Output method: IIC, analog voltage signal, etc.
  • Quick response
  • Temperature compensation, excellent linear output
  • Excellent stability, Long lifespan
  • Anti-poisons, anti-vapor interference
  • Detect combustible gas concentration matching with flame-proof marked detector in area 1&2 explosive environments which mix of ⅡA, ⅡB, ⅡC and T1-T6 flammable gases, vapors and air


Product Model MH-T7042A
Gas Detected Combustible gas (see Table2)
Working Voltage 4.5~5.5V DC
Average Current < 100mA
Interface Level 3.3V
Measurement Range 0~100%VOL optional (table 2)
Output Signal UART
Warm-up Time <2minutes
Response Time T90 < 30s
Working Temperature -40℃ ~ 70℃
Working Humidity 0 to 95%RH, non-condensing
Dimension Φ51×65mm
Weight 450g
Lifespan >5 years
Explosion-proof sign Ex db ⅡC T6 Gb
Protection Grade IP65

Table 2

Gas Name Molecular Formula Detection Range Resolution Precision Note
Methane CH4 0-5% Vol 0.01% Vol 0~50% FS (±3%FS) 50%~100% FS (±5%FS) With Temperature compensation
Methane CH4 0-10% Vol 0.01% Vol
Methane CH4 0-100% Vol 0.1% Vol
Propane C3H8 0-2.2% Vol 0.01% Vol
Chloromethane CH3CL 0-8.1% Vol 0.01% Vol
Acetylene C2H2 0-2.3% Vol 0.02% Vol
Ethane CH3CH3 0-3.0% Vol 0.03% Vol
Isobutene C4H10 0-1.8% Vol 0.018% Vol
Gasoline C3-C12 0-1.1% Vol 0.01% Vol 0~50% FS (±5%FS) 50%~100% FS (±10%FS) No Temperature compensation
Methanol CH3OH 0-5.5% Vol 0.06% Vol
Dichloromethane CH2CL2 0-15% Vol 0.15% Vol
Toluene C7H8 0-1.2% Vol 0.012% Vol
Alcohol C2H5OH 0-3.3% Vol 0.033% Vol
Oxirane C2H4O 0-3.0% Vol 0.03% Vol
Acetic acid CH3COOH 0-4.0% Vol 0.04% Vol
Ethyl acetate CH3COOC2H5 0-2.0% Vol 0.02% Vol

* 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.