Target: O2
Model: MED-O2-LA
Detection principle: Electrochemical
Characteristics: Low consumption,High precision
Response time: <15 s

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MED-O2-LA Oxygen sensor is fuel-cell type electrochemical sensor. The reduction action of oxygen occurs on the working electrode and oxidation reaction of anode materials occurs, release charge to form current. The current generated is proportional to the partial pressure of oxygen and follows Faradi's law. The partial pressure of oxygen could be obtained by measuring value of current.


Suitable for oxygen monitoring in oxygen machine, respiration and anesthesia etc. medical equipment.


  • Low consumption
  • High precision
  • Wide linear range
  • Excellent repeatability and stability


Item Parameter
Detection gas O2
Measurement Range 0 -100%VOL O2
Sensitivity 8-15mV (in air)
Response time (T90) <15 s
Repeatability <2%output value
Output Linearity Linear in full scale
Interface P/N 5520257-2
Temperature Range -20℃~50℃
Humidity Range 0%~90%RH (No Condensation)
Pressure range   0.5 Bar - 2.0 Bar                  
Anticipated using life 1.5x106%O2hours (20℃) 0.8x106%O2hours (40℃)

* 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.