Target: O2
Model: ME2-O2-Ф20
Detection range: 0~25%Vol
Detection principle: Electrochemical
Characteristics: Low consumption,High precision
Resolution and accuracy: (0.08-0.25)mA (In air)

ME2-O2-Ф20 Manual download
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ME2-O2-Ф20 electrochemical sensor detect gas concentration by measuring current based on the electrochemical principle, which utilizes the electrochemical oxidation process of target gas on the working electrode inside the electrolytic cell, the current produced in electrochemical reaction of the target gas are in direct proportion with its concentration while following Faraday law, then concentration of the gas could be get by measuring value of current.


Detecting O2 in mine, industry and environmental protection field.


  • Low consumption
  • High precision
  • High sensitivity
  • Wide linear range
  • Good anti-interference ability
  • Excellent repeatability and stability


Item Parameter
Detection gas O2
Measurement Range 0~25%Vol
Max detecting concentration 30%Vol
Sensitivity (0.08-0.25)mA (In air)
Response time(T90) ≤15S
Load resistance(recommended) 100Ω
Repeatability <2﹪output value
Stability(/month) <2﹪
Zero drift(-20℃~40℃) ≤1%vol
Storage temperature -20℃~50℃
Storage Humidity 0﹪~99﹪RH (nocondensation)
Pressure range normal atmosphere±10%
Anticipated using life 2 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.