Target: C2H5OH, alcohol, ethanol
Model: MR513
Detection principle: Hot-wire gas sensor
Characteristics: High sensitivity, large signal output
Size: Φ12mm×10mm

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MR513 alcohol C2H5OH gas sensor detect the ethanol gas concentration through resistance variation of platinum loop, which is based on the principle of the gas absorbed on the surface of metal oxide semiconductor lead to the heat exchange and electricity exchange variation. It consists of detecting element and compensating element, which are the two legs of electric bridge. When exposing to the combustible C2H5OH gas, the resistance of detecting element reduces and the voltage variation of bridge output increase in direct proportion according to gas concentration. The compensating element performs for the reference and temperature compensation functions.


Portable alcohol detector and automotive ignition control system for domestic, industrial spot.


  • High sensitivity, large signal output
  • Short duration of initial stabilization, fast response.
  • Good reproducibility and reliability
  • Low consumption, miniature design


Model MR513
Type Hot-wire gas sensor
Standard encapsulation Plastic encapsulation
Working voltage(V) 2.5±0.1
Working current(mA) ≤100
Sensitivity(mV) ≥60  (alcohol 100ppm)
Linearity(%) 0~5
Response time (90%) ≤20
Resume time (90%) ≤40
Using environment -20-+50℃ under 95%RH
Storage environment -20—+70℃ under 70%RH
Dimension(mm) Φ12mm×10mm

* 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.