Paramagnetic Analyzer

Explanation

An essential principle employed in our oxygen sensor is paramagnetism, which is unique to oxygen. The measurement cell is positioned within a magnetic field, and a specifically shaped element is placed in the magnetic field space. This element is initially balanced but free to move. Additionally, a mirror is mounted at the center of the element, which reflects a beam of light from a light source onto photo cells. Oxygen exhibits paramagnetic properties, meaning it is attracted to the magnetic field. When a sample of the gas stream containing oxygen and other gases is introduced, the oxygen displaces the element, causing it to rotate. As a result, the element becomes unbalanced, and the mirror reflects the light beam in a different direction.

To restore balance to the sensor, an electrical circuit loop around the element is charged with a specific amount of current. The magnitude of the applied current is directly proportional to the concentration of oxygen in the sample.

In summary, this principle utilizes the magnetic field's attraction to oxygen to measure gas concentrations. The rotation of the element, detected by the change in reflected light, is counterbalanced by the application of current, providing a precise measurement of oxygen concentration in the gas sample.