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

Get Price Whatsapp


MR007 hot wire gas sensor is composed of a test element and a compensation element. The resistance of the test element changes with the change of electrical and heat conduction produced by the adsorption of combustible gas on the surface of sensitive materials, so as to measure the gas concentration. The detection circuit adopts a Wheatstone bridge, which is composed of a detection element and a compensation element paired to form an arm of the bridge. When a flammable gas is encountered, the resistance of the detection element decreases, and the output voltage of the bridge changes. The voltage change increases with the increase of the gas concentration. The compensation element acts as a reference and temperature compensation.


Combustible gas natural gas coal gas LPG gas leakage monitor and detector; high-end household gas sensing alarm, home gas safety


  • Excellent resistance of Silicon, H2S, cooking smoke, alcohol, vinegar, etc. Meeting different use conditions of combustible gases.
  • Compliant with the latest Chinese standard GB 15322-2019 and international requirement.
  • Great cost and first choice for high end household gas alarm.
  • Super low false alarm, solving the pain point of inspection failure at user end.


Sensor model MR007
Sensor type Hot wire gas sensor
Application Combustible gas leakage detection(natural gas/LPG gas/ coal gas)
Encapsulation Steel cap+plastic base
Working voltage (V) 2.5±0.1
Working current (mA) 150±10
Zero Point (mV) ±30
Sensitivity (mV) 20%LELMethane CH4 12~45
20%LELPropane C3H8 10~30
Measurement range (%LEL) 0~100
Response time (T90) ≤10s
Restore time (T90) ≤30s
Working temperature humidity -40~+70℃, <95%RH
Storage temperature humidity -20~+70℃, <95%RH
Life 5 years

* 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.