Target: LPG, C3H8 propane
Model: MP-5
Detection range: 300-10000ppm
Detection principle: Semiconductor
Characteristics: Highest sensitivity to C3H8
Size: φ9.4×7
Working conditions: Loop Voltage:≤24V Heater Voltage:5±0.1V Heater consumption:≤300mW

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MP-5 gas sensor is for flammable gases. It adopts multilayer thick film manufacturing technology. The heater and metal oxide semiconductor material on the ceramic substrate of Al2O3 are fetched out by electrode down-lead, encapsulated in metal socket and cap. Conductivity of the sensor is affected by the concentration of target gas. The higher the concentration is, the higher conductivity of sensor gets. Users can adopt simple circuit to convert variation of conductivity into output signal corresponding to gas concentration.


It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.


  • Lower consumption
  • Small size
  • Fast response and resume
  • Highest sensitivity
  • Excellent stability and long life
  • Easy circuit and big signal output
  • Excellent selectivity


Model MP-5
Sensor Type Flat surfaced semiconductorsensor
Standard Encapsulation Metal cap
Target Gas LPG
Detection range 300-10000ppm LPG
Standard Circuit Conditions Loop Voltage Vc ≤24V DC
Heater Voltage VH 5V±0.1V AC or DC
Load Resistance RL Adjustable
Sensor character under standard test conditions Heater Resistance RH 85Ω±15Ω (room temp.)
Heater consumption PH ≤300mW
Sensitivity S Ro(in air)/Rs(2000ppm C3H8)≥5
Sensitive resistance RS 1KΩ~20KΩ(in2000ppm C3H8)
Concentration Slope α ≤0.6(R2000ppm/R500ppm C3H8)
Standard test conditions Tem.  Humidity 20℃±2℃;65%±5%RH
Standard test circuit Vc:5V±0.1V; VH: 5V±0.1V
Preheat time Not less than 48 hours
O2 content 21%(not less than 18%) O2 concentration effects initial value, sensitivity and repeatability.
Lifespan 10 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.