Limiting Oxygen Index Test Apparatus

Laboratory Limiting Oxygen Index Test Apparatus As Per ASTM D 2863

Model STFRLS16

Scope:
To determine the minimum percentage of oxygen required to just support flaming combustion as candle like burning of a material at room temperature or at higher temperature.

Significance:
This method provides for the measuring of the minimum concentration of oxygen in a flowing mixture of oxygen and nitrogen that will just support flaming combustion of plastics.

Summary of Method:

The minimum concentration of oxygen in a mixture of oxygen and nitrogen flowing upward in a test column that will just support combustion is measured under equilibrium conditions of candle like burning. The equilibrium is established by the relation between the heat generated from the combustion of the specimen and the heat lost to the surroundings as measured by one or the other of the two arbitrary criteria, namely, a time of burning or a length of specimen burned. This point is approached from both sides of the critical oxygen concentration in order to establish the oxygen index.