









Electrochemical Oxygen Sensor 4S-O2
Summary:
The electrochemical 4S-O2 oxygen sensor is based on the principle of electrochemistry, using the measured gas to undergo a corresponding redox reaction on the working electrode and the counter electrode of the sensor and release the charge, and form a current through the external circuit. The magnitude of the current is proportional to the gas concentration, thereby Realize quantitative measurement of target gas.
Feature:
APPLICATION
Formaldehyde detector is an instrument for detecting formaldehyde. Generally, semiconductor sensors and electrochemical sensors are used to realize the rapid semi-quantification of formaldehyde in indoor air on the spot, which is characterized by simple structure, small size, intuitive,easy to carry and use.
Didn't Find Your Tarket Application?
Winsen offers tailor-made gas sensor solutions for your industry
PARAMETER
Technical Data Sheet
Performance | Output | Output (µA) in 20.9%O2 | 80-120 |
Response time | t90 time (s) from 20.9% to 0% O2 | < 15 | |
Zero point current | Output in N2 (µA) | < 2.5 | |
Linearity | Oxygen deviation percentage at 10%O2 | 0.6 | |
Lifespan | Output drift | 3 month output percentage change | < 1 |
life span | Number of months for output to drop to 85% of original output at 20.9% O2 | > 24 | |
Environment | Humidity sensitivity | Percent oxygen change: 0~95%RH, 40°C | < 0.7 |
CO2 sensitivity | Percent change in oxygen reading/CO2 concentration at 5% CO2 | 0.1 | |
Pressure sensitivity | At 20kPa, output change percentage/pressure change percentage | < 0.1 | |
Key parameter | Temperature range | ℃ | -30~55 |
Pressure range | kPa | 80~120 | |
Humidity range | Percentage of continuous relative humidity (0~99%RH in the short term) | 5~95 | |
Storage period | Storage months at 3~20℃ | 6 | |
Load Resistance | Ω (recommended) | 47~100 | |
Diameter | mm (with label) | 20 | |
Height | mm (with foam gasket) | 17.4 | |
Weight | g | < 16 |

Free Guide! Learn the Parameter Differences of Similar Sensors
Wondering how to find the most suitable one for you out of so many sensors? Download our free guide to learn the comparison table of technical parameters.
RELATED PRODUCTS
As a pioneer in gas sensor based solutions with the advanced processes, technologies and products, Winsen offers a wide range of gas sensors:
RELATED PRODUCTS
As a pioneer in gas sensor based solutions with the advanced processes, technologies and products, Winsen offers a wide range of gas sensors:
WHY CHOOSE WINSEN
Professional and Trustworthy
Brand Precipitation
Focus on Sensor Field
National Patents
International Advanced Technology
Detection Objects
More Than 300 Kinds
Production Process
Excellence Products
Provide 60+ Countries with Solutions
Serve the Global Market
Cooperate with 300+ well-known Enterprises
More Customer’s Choice
How to choose the right sensor for your project?
We have 17 sensor series, 200+ categories, and 300+ detection objects for gas detection. Such as CO, CO2, VOC, PM2.5, CH4, LPG and so on. In particular, we also have MEMS sensors. According to your industry application, gas principle, power consumption, accuracy, and range requirements, and we can select a specific model for you. You can also use the product filter below to choose a suitable product, or choose online serivce.
Here you can learn about the selection guide, common technical problems, packaging, transportation, MOQ, delivery time, etc.
Factory or Trade Company?
How long is the delivery time?
What is your warranty term?