Target: CH4 methane C3H8 propane, combustible gas, natural gas, coal gas, LPG gas
Model: MR007
Detection range: 0~100 LEL
Detection principle: Hot wire
Characteristics: Increased stability, high accuracy, high sensitivity, great linearity and repeatabililty
Response time: ≤10s

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MR007 gas sensor consists of a test element and a compensation element. The resistance of the test element changes with the variation of electrical and thermal conductivity caused by the adsorption of flammable gas on the surface of the sensitive material, thereby measuring the gas concentration. The MR007 detection circuit adopts a Wheatstone bridge, which consists of a pair of detection elements and compensation elements as one arm of the bridge. When encountering flammable gas, the resistance of the detection element decreases, and the output voltage of the bridge changes. This voltage change increases with the increase of gas concentration. The compensation element serves as a reference and temperature compensation.


Suitable for combustible gas detection including Natural gas, LPG, and coal gas, etc.


MR007 gas sensor has advantages of good linearity, fast response , excellent repeatability, stable and reliable operation of the components, and good resistance to hydrogen sulfide and silicone interference.


Model Part MR007
Sensor Type Hot-wire gas sensor
Standard Package plastic base metal packaging
Working Voltage(V) 2.5±0.1
Working current(mA) 150±10
Zero-point(mV) ±30
Sensitivity(mV) 20%LEL CH4 12~45
20%LELC3H8 10~30
Measurement range(%LEL) 0~100
Response Time (T90) ≤10s
Recovery Time (T90) ≤30s
Working Environment -40~+70℃, less than95%RH
Storage Environment -20~+70℃,less than95%RH
Lifespan 5 Year

* 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.