Oxygen index accordingly to the ISO4589/2 CEI 20-22/4 ASTM 2863

To automatically determine the minimum quantity of oxigen required for combustion. The apparatus determines the flammability characteristics of the materials used in the production of electric cables. The oxygen percentage is detected by a paramagnetic transducer (O2 accuracy <0.1%), and the combustion occurs inside the glass column.

The operator is fixing  only the O2 ratio, while the N2 flux is kept costant by proportional valve of the electronic system.

Two units separated, one to check the meausurements and one to feeder oxygen and nitrogen to the column where the testing sample is placed.

See the video below that shows the test procedure.

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