Oxygen Index Tester is used to determine the lowest oxygen density that tested materials keep steady burning under oxygen and nitrogen mixed gas. Product Information: Oxygen Index Test Apparatus Features: 1. Used to determine the lowest oxygen density that tested materials keep steady burning under oxygen and nitrogen mixed gas. 2. Utilizing the latest oxygen analyzer technology, the unit provides a stable, digital readout of oxygen concentration to ± 0.1%. 3. A heavy duty Pyrex chimney is provided, along with two types of sample holder: A. For non-self-supporting sheet samples (e.g. textiles, films, papers, etc.) Sample size: 150 × 37.5 mm and up to 12 mm thick. B. Self-supporting rod samples (e.g. plastics, wood, etc.). Sample size: 150 mm length and up to 10 mm diameter. 4. Automatic calibration.