Working Principle of Limiting Oxygen Index Tester

The Limiting Oxygen Index (LOI) Tester creates a controlled atmosphere containing a mixture of oxygen and nitrogen in which a specimen is ignited under specified test conditions. By adjusting the oxygen concentration, the instrument determines the minimum oxygen percentage required to sustain combustion of the material.

The test helps evaluate the flammability characteristics of materials and supports quality control, research, and material evaluation across industries such as plastics, packaging, automotive, electrical, and textiles.

The Limiting Oxygen Index Tester is used with recognised testing methods, including ASTM D2863 and IS 13360 (Part 6/Section 19), subject to the instrument configuration and applicable test requirements.

Applications of Limiting Oxygen Index Tester

• Plastic and polymer testing

• Packaging material evaluation

• Electrical insulation material testing

• Automotive interior component testing

• Textile and coated fabric testing

Features of Limiting Oxygen Index Tester

• Precise Oxygen Measurement: Equipped with an electrochemical oxygen analyser for accurate and stable measurement of oxygen concentration.

• Digital Timer Control: Programmable timer with high resolution for measuring flame duration and observing burning behaviour.

• Accurate Temperature Monitoring: Integrated digital temperature indicator for real-time monitoring of test conditions.

• Dual Gas Flow Control System: Independent flow meters for oxygen and nitrogen to control gas mixture ratios.

• Robust Combustion Column Design: Transparent column provides clear visibility of specimen behaviour during testing.

• User-Friendly Operation: Simple interface with convenient calibration and control for consistent, repeatable testing.

• International Testing Standards: Designed for testing according to ASTM and IS standards, subject to the instrument configuration and applicable test method.

• Safety-Oriented Construction: Protective features designed to support safe operation during combustion testing.

Technical Specifications of Limiting Oxygen Index Tester