Standards:

ISO 4589-2, ASTM D2863, GB/T 2406, GB/T 5454

Applications:

This tester is used to determine the lowest oxygen density that tested materials keep steady burning under oxygen and nitrogen mixed gas.

Product Information:

The (Limiting) Oxygen Index Test Apparatus measures the minimum oxygen concentration needed to sustain combustion of solid materials like textiles and plastics. Samples are fixed vertically in a transparent cylinder with an oxygen-nitrogen mixture, ignited at the top, and observed for combustion characteristics. By comparing burn time or length against limits, the ultimate oxygen index is determined, offering an efficient, user-friendly method for material research and quality control.

Features:

1. Used to determine the lowest oxygen density that tested materials keep steady burning under oxygen and nitrogen mixed gas.
2. The latest oxygen analysis method to offer a stable gas supply agencies, oxygen percentage accuracy up to ±0.1%.
3. Specific heat-resisting quartz glass combustion tube, made from heat-resistant borosilicate glass, with two types of sample holders:
A. Used for non-supported specimen, such as such as textiles, plastics and papers, etc, size of specimen:150×37.5mm, thickness:<12mm.
B. Used for support specimen in stick shapes, such as plastics and woods, size of specimen: 150mm in length, diameter:<10mm.
4. With function of automatic calibration.
5. Digital display and direct control of oxygen concentration.
6. Automatic control of oxygen and nitrogen concentration in the desired concentration.
7. Digital display monitor, for visual display of instrument condition, oxygen concentration, gas flow rate, temperature of quartz glass tube, and usage time.
8. With gas cut-off valve, flow meter, filter.
9. Equipped with a burner and technical manual.
10. Product weight: 45kg.
11. Product dimensions: 460 mm(W)×410mm(L)×780mm (H).

Parameters：

FAQ：

(1) What is this product?
An instrument that measures the minimum oxygen concentration required to sustain combustion of solid materials.
(2) What is this product used for?
To determine flame-retardant performance of plastics, textiles, rubber, foam, film, and wood under controlled oxygen-nitrogen conditions.
(3) What is the working principle of this product?
A sample is placed in a transparent cylinder, exposed to a controlled O₂/N₂ mixture, ignited at the top, and the oxygen level is adjusted to determine the LOI.
(4) Why is this product important?
It allows manufacturers and labs to evaluate material flammability accurately, ensuring compliance with safety standards.
(5) Which industries is this product suitable for?
Plastics, textiles, rubber, foam, film, wood, fire research labs, quality inspection agencies, and manufacturing quality control.