In the industrial field, the accuracy and reliability of process control cannot be compromised, and how to accurately measure the concentration of process gases has always been the pursuit goal of online gas analysis instrument manufacturers.

Oxygen, as one of the fundamental elements for sustaining life, is also the most critical reactant or environmental indicator in many industrial processes in the industrial field. Accurately measuring and controlling oxygen content is a key measurement parameter for achieving safe, efficient, clean, and high-quality production.

Common oxygen analysis techniques include electrochemistry, zirconia, laser, paramagnetic, etc. Among the many available technologies, paramagnetic oxygen analyzers stand out for their accuracy, consistency, and reliability in stable applications under various complex, harsh, and corrosive conditions. But what makes them so effective? Why is it trustworthy in so many industries?

The answer lies in its unique ability to measure oxygen based on paramagnetism - a characteristic that most other gases do not possess.

How does paramagnetic oxygen sensor work?

Oxygen is naturally paramagnetic, which means that oxygen molecules are attracted to a magnetic field due to their unpaired electrons. When oxygen encounters a magnetic field, its behavior is different from most other gases, which are usually non-magnetic. This characteristic allows paramagnetic oxygen analyzers to detect and measure oxygen concentration with high accuracy.

Simply put, a paramagnetic oxygen analyzer utilizes“The attractive force of magnetic field on oxygen molecules”Come to work. This attraction can be detected and converted into electrical signals through different mechanical means, mainly achieved in the following ways:

Paramagnetic type: The sensor is equipped with two glass balls filled with nitrogen gas that are connected to each other and installed on a rotating suspension. When the sample gas containing oxygen flows into the analysis cell, oxygen molecules are attracted to areas with strong magnetic fields due to their paramagnetic properties, causing the dumbbell ball to deflect. The size of the deflection is linearly related to the oxygen content, and the oxygen content can be accurately calculated by detecting the deviation change through optical components.

In addition, there are magnetic compression and thermomagnetic methods. The former uses the paramagnetism of oxygen to generate pressure differences in a magnetic field for measurement, while the latter combines paramagnetism and thermal properties for detection.

Compared with electrochemical detection methods, paramagnetic method has the following key advantages:

1. Non consumable, with a longer lifespan

2. Small drift, no consumables, accuracy will not significantly decrease over time, low calibration frequency

3. Sensors are more corrosion-resistant

3. Wide measurement range

Typical applications of paramagnetic oxidation analyzer in industry:

1. Combustion process: Insufficient or excessive oxygen content during the combustion process can have an impact on the combustion process, resulting in energy waste due to insufficient combustion. Excess gas with excessive oxygen content is not heated, but instead takes away a large amount of heat, which also reduces thermal efficiency. Accurately controlling the oxygen content during the combustion process can help improve efficiency, save energy, and reduce emissions.

2. Production safety: control reaction rate and ensure production process safety; For example, reaction vessels, centrifuges, or catalytic cracking processes in the chemical, pharmaceutical, and petrochemical industries require strict control of oxygen content to prevent the formation of explosive mixtures.

3. Atmosphere control: In the industrial field, inert gas protection and atmosphere control require strict control of oxygen content to prevent oxidation and ensure product quality.

4. In the medical field, whether it is medical liquid oxygen pure oxygen or molecular sieve adsorption oxygen production, it is necessary to test the oxygen purity of the product.

The paramagnetic oxygen analyzer, with its unique detection principle and stable performance, has always been the mainstay of industrial process gas analysis, emitting light and heat in many fields. Due to the high requirements of its sensor technology, paramagnetic oxygen in the domestic market is mainly importedABBForeign magnetic oxygen products such as Shifumei are the main ones.

Norco Instruments has been engaged in the research and production of gas analyzers for nearly 20 years. As a veteran in the gas analyzer industry, our paramagnetic oxygen analyzer uses imported sensors combined with rich on-site application experience to provide high-quality solutions for different industry process conditions.

Choosing Noriko Instruments' paramagnetic oxygen analyzer is not only about choosing a high-quality product, but also about choosing a reliable partner dedicated to solving complex gas analysis problems, improving after-sales service, and helping to achieve safe, efficient, and clean production.