Target: O2
Model: MEu-2O2
Detection range: 0~25% VOL
Detection principle: Electrochemical
Characteristics: Low power consumption, high precision
Response time: ≤15S

MEu-2O2 Manual download
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MEu-2O2 oxygen sensor is a fixed potential type sensor. Oxygen undergoes a reduction reaction on the working electrode, and at the same time, a corresponding oxidation reaction occurs on the counter electrode, releasing charges to form a current. The current is proportional to the oxygen concentration and follows Faraday's law.
The size can determine the level of oxygen concentration.


Widely used in oxygen concentration detection in industries, mines, warehousing and environmental protection


  • Low power consumption,
  • High precision
  • Wide linear range
  • Strong anti-interference ability
  • Excellent repeatability and stability


Item Parameter
Detection gas Oxygen(O2)
Measurement Range 0~25% VOL
MaxRange 30% VOL
Sensitivity 0.10±0.02mA(in the air)
Response time(T90) ≤15S
Load resistance (recommended) 100Ω
Repeatability <2% output value
Output linearity linear
Working temperature -20℃~50℃
Working humidity 15﹪~90﹪RH
Working pressure 1atm±10%  
long-term drift <2%/Month

* 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.