This website uses cookies to ensure you get the best experience on our website. Learn more.
Enter your search word
 

Paramagnetic

Some gasses such as O2 have paramagnetic characteristics due to non-paired electrons. This feature can be used by letting the gas pass through a magnetic field in a gas analyser. When O2 passes through the gas analyser, the magnetic field is activated, and this energisation will be in direct ratio to the O2-concentration of the gas that is led through the analyser.

Normally 2 types of paramagnetic measuring cells are used. One type, dump-bell, consists of N2-filled bulbs mounted onto a thin wire in a magnetic field (the measuring cell). The bulbs are bent off more or less from centre of the measuring cell dependent of the O2-concentration. The bend is proportional to the O2-concentration.

The other type, thermo magnetic, consists of a heated wire placed in a magnetic field (the measuring cell). When O2 is led through the measuring cell, it is dragged towards the magnetic field which gives a cooling of the heated wire and thus a change in resistance. The change of resistance in the heated wire is proportional with the O2-concentration.
No item found