Fully‑Automatic High‑Temperature Oxygen Index Teste

YZS‑GW Model  Fully‑Automatic High‑Temperature Oxygen Index Tester (Intelligent Type)

This fully‑automatic oxygen index tester, developed and manufactured by Beijing Xinsheng Zhuorui Technology Co., Ltd. 

and Xunyu Technology Co., Ltd., is an instrument for testing the flame‑retardant performance of materials.

 It determines the minimum oxygen concentration required to just sustain specimen combustion in a mixed gas of oxygen 

and nitrogen under specified test conditions. It is applicable for combustion‑performance testing of plastics, rubbers, 

electrical conduits, fibers, foamed plastics, sheets, films, textiles and other materials.

I. Product Advantages of Intelligent Fully‑Automatic Touch‑Screen Controlled Oxygen Index Tester

1. Full‑color touch‑screen control: Simply set the oxygen concentration value on the touchscreen. 

The program will automatically adjust until oxygen concentration reaches equilibrium and emit a beep prompt, 

eliminating manual oxygen‑concentration adjustment.

2. Stepper proportional valves are adopted to greatly improve flow‑control accuracy. 

Closed‑loop control is implemented: in case of oxygen‑concentration drift during testing, 

the program automatically readjusts back to the target value. 

It overcomes the drawback of traditional oxygen index testers which cannot adjust oxygen concentration mid‑test, 

and substantially enhances test accuracy.

II. Main Technical Parameters of Intelligent Fully‑Automatic Touch‑Screen Controlled Oxygen Index Tester

1. Imported oxygen sensor; digital direct readout of oxygen concentration with no manual calculation required, higher accuracy. 

   Measuring range: 0‑100%

2. Display resolution: 0.1

3. Digital resolution: ±0.1%

4. Touch‑screen setting for automatic program‑driven oxygen‑concentration adjustment

5. One‑click accuracy calibration

6. One‑click concentration gas‑mixing

7. Audible alarm prompt upon oxygen‑concentration stabilization

8. Built‑in timing function

9. Experimental data storage

10. Historical‑data query function

11. Historical‑data clearing function

12. Optional setting for 50 mm combustion criterion

13. Gas‑source fault alarm prompt

14. Oxygen‑sensor fault alarm prompt

15. Wrong‑connection alert for oxygen and nitrogen gas lines

16. Oxygen‑sensor aging reminder

17. Standard oxygen‑concentration input

18. Combustion‑chamber diameter configurable (two commonly‑used specifications optional)

19. Flow adjustment range: 0‑25 L/min (0‑1500 L/h)

20. Quartz glass combustion chamber: two optional sizes (inner diameter ≥75 mm or inner diameter ≥85 mm)

21. Gas flow velocity inside combustion chamber: 40 mm±2 mm/s

22. Overall unit dimension: 650 mm×400 mm×830 mm

23. Pressure gauge accuracy: Grade 2.5

24. Test environment: Ambient temperature: room temperature ~ 40 ℃; relative humidity ≤70%

25. Inlet gas pressure: 0.25‑0.3 MPa

26. Working gas pressure: Nitrogen: 0.15‑0.20 MPa; Oxygen: 0.15‑0.20 MPa

27. Specimen holder compatible with flexible and rigid plastics, various building materials, textiles, fire‑resistant doors, etc.

28. Propane (butane) ignition system. 

    The ignition nozzle is a flexible metal tube fitted with a Φ2±1 mm inner‑diameter orifice at the tip.

    It can be bent freely and inserted into the combustion chamber to ignite specimens.

    Flame length: 16±4 mm, adjustable within 5 mm‑60 mm.

29. Test gases: Industrial‑grade nitrogen and oxygen, purity＞99%; 

     (gas supplied by user; typical industrial oxygen purity from certified gas stations ranges from 99.2%‑99.3%).

30. Power supply: AC 220 V (+10%), 50 Hz

31. Power consumption: 150 W

32. Self‑supporting‑material specimen holder: mounts concentrically inside combustion chamber for vertical specimen clamping

33. Non‑self‑supporting‑material specimen holder: 

secures both vertical edges of specimens onto frame (optional accessory, for soft non‑self‑supporting materials such as textiles)

34. Printing function: Data‑report printing via upper‑computer software (optional)

35. Temperature‑control device (optional)

36. Test‑temperature range for high‑temperature oxygen index tester: 25 ℃ ~ 150 ℃

     Temperature‑control accuracy: ±2 ℃ for temperatures ≤125 ℃; ±3 ℃ for temperatures＞125 ℃

III. Design Standards：

GB/T 2406.2‑2009, GB/T 2406.1‑2008

Complies with:

ISO 4589‑3, ASTM D 2863, ISO 4589‑2, NES 714, GB/T 5454, GB/T 10707, 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