Digital Flow Limiting Oxygen Index is used for determining the minimum percentage of Oxygen required to just support flaming combustion of a material at room temperature in FTA mode or at Higher Temperature [up to 400 degree C] in HFTA mode. The Limiting Oxygen Index operates at a voltage range of 220V 50 Hz or 110V 60 Hz. The Digital Flow Limiting Oxygen Index has a double walled test column of flame resistance glass of 75 mm diameter suitable for testing different size of samples in FTA or HFTA mode.