AIC - Model ZKG - Paramagnetic Oxygen Analyzer
From Gas Analysers
- Since reference gas is unnecessary due to use of a dumbbell type paramagnetic system, this analyzer will not entail an additional running cost.
- The principle of measurement is dependent on the strong magnetic property of oxygen molecules. Therefore, measurement is almost unaffected by other molecules weaker in magnetic property than oxygen.
- Suited for measuring oxygen in flammable gas.
- Small-sized and easy to handle.
- Usable with a wide range of power supplies.
- Output is linear.
Principle of Measurement
In the cell, two glass spheres filled with nitrogen gas are suspended with strong metal. At first, the spheres are kept in balance in an inhomogeneous magnetic field. When oxygen molecules having a large magnetic susceptibility flow there, the molecules are pulled toward the stronger magnetic field zone and the spheres are moved away from the zone. The resulting deviation of the spheres is detected with the light source, reflecting mirror and light receiving element, and a current is flowed through the feedback loop to control so that the spheres can return to the initial balanced state. The current flowing through the feedback loop is proportional to oxygen concentration. Thus, oxygen concentration is converted into an electric signal.
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