JF‑3 Digital Oxygen Index Tester

Developed and manufactured by Beijing Xinsheng Zhuorui Technology Co., Ltd. and Xunyu Technology Co., Ltd., this digital oxygen index tester is used to evaluate the combustion performance of polymers under specified test conditions, namely to determine the minimum volumetric percentage concentration of oxygen at which polymers can just sustain combustion.

1. Scope of Application

It is suitable for the combustion performance test of plastics, rubber, fibers, foamed plastics, sheets, films, textiles and other materials.

2. Technical Parameters

1. Adopts imported oxygen sensor; oxygen concentration displayed digitally without calculation, higher accuracy. Measuring range: 0–100%;

2. Digital resolution: ±0.1%;

3. Overall measurement accuracy: Class 0.4;

4. Flow adjustment range: 0–10 L/min (60–600 L/h);

5. Response time: ＜5 s;

6. Quartz glass combustion chamber: inner diameter ≥75 mm, height 480 mm;

7. Gas flow velocity inside combustion barrel: 40 mm ±2 mm/s;

8. Pressure gauge accuracy: Class 2.5, resolution: 0.01 MPa;

9. Flowmeter: adjustable 1–15 L/min (60–900 L/H), accuracy Class 2.5;

10. Test environment: Ambient temperature: Room temperature ~ 40℃; Relative humidity: ≤70%;

11. Inlet pressure: 0.2–0.3 MPa;

12. Working pressure: Nitrogen 0.05–0.15 MPa, Oxygen 0.05–0.15 MPa. Oxygen / nitrogen mixed gas inlet equipped with pressure stabilizer, flow regulating valve, gas filter and mixing chamber.

13. Sample holder suitable for flexible & rigid plastics, textiles, fire doors and other materials;

14. Propane (butane) ignition system, flame length adjustable from 5 mm to 60 mm;

15. Gas: Industrial nitrogen and oxygen, purity＞99%; (Note: Gas source and connectors to be prepared by user).

Tips: For oxygen index test, one bottle of industrial oxygen and one bottle of industrial nitrogen (purity ≥98%) shall be used as gas source. These gases are classified as high-risk goods for transportation, so they cannot be supplied as accessories of the tester. Users shall purchase them from local gas stations.

16. Power supply: AC220V (+10%), 50Hz;

17. Power consumption: 50 W;

18. Igniter: Made of metal tube with a nozzle of Φ2±1 mm inner diameter at the tip. It can be inserted into the combustion barrel to ignite samples. Flame length: 16±4 mm, adjustable;

19. Sample holder for self-supporting materials: Can be fixed at the axial center of combustion barrel and clamp samples vertically;

20. Sample holder for non-self-supporting materials: Can fix two vertical edges of the sample on the frame at the same time (optional, for textiles, films and similar materials).

3. Cabinet Structure

1. Control cabinet: CNC machined, electrostatic sprayed steel sheet enclosure. The control section and test section are designed for separate control;

2. Combustion barrel: High temperature resistant premium quartz glass tube (inner diameter φ75 mm, length 480 mm), outlet inner diameter φ40 mm;

3. Sample clamps: Self-supporting clamp to hold samples vertically. Non‑self-supporting sample rack is optional. Two sets of clamps meet different test requirements. Plug‑in design for easier sample loading;

4. Long‑rod igniter: Tip bore diameter φ2±1 mm, igniter flame length adjustable within 5–50 mm.

4. Applicable Standards

Design standard: GB/T 2406.2-2009 Compliant standards: ASTM D 2863, ISO 4589-2, NES 714, GB/T 5454, GB/T 10707-2008, GB/T 8924-2005, GB/T 16581-1996, NB/SH/T 0815-2010, TB/T 2919-1998, IEC 61144-1992, ISO 15705-2002, ISO 4589-2-1996

ISO 4589 Digital Oxygen Index Tester Limiting Oxygen Index