There are so many oxygen analyzers on the market - should you choose an electrochemical or paramagnetic one? Many fans find it hard to decide. To help with this, let's first compare the analysis principles of paramagnetic and electrochemical online oxygen analyzers to get a better understanding.
Magnetic oxygen analyzers utilize the strong paramagnetism of oxygen molecules, which cause them to move in the direction of an increased magnetic field. When gases with different oxygen contents meet under the same magnetic field, a pressure difference is generated, and this pressure difference can be used to determine the oxygen content of another gas. The advantage of magnetic oxygen analyzers is their high measurement accuracy. Compared to electrochemical detection methods, they have no consumable parts, so they generally have a longer lifespan. The core component of the analytical principle of electrochemical online oxygen analyzers is an electrochemical oxygen sensor. The gas entering the sensor undergoes oxidation/reduction reactions at the sensing electrodes, generating a current that is proportional to the oxygen concentration between the cathode and anode. Based on this, electrochemical oxygen analyzers have advantages such as high versatility, good cost-effectiveness, and accurate measurement precision.
That's the comparison of the analytical principles between magnetic and electrochemical online oxygen analyzers. At present, both types of instruments have their own strengths. Xi'an Runlai Instrument Co., Ltd. can provide both types of online analytical instruments based on these principles. The specific choice will depend on the actual operating conditions and process points.
