The polymer oxygen index value is the minimum oxygen concentration (also known as oxygen index) required to maintain the combustion of the sample in the mixed air flow of oxygen and nitrogen required when the substance is ignited and burned for 50mm long or the burning time is 180s. 【Relevant Standards】

GB/T 2406.2-2009

【Scope of application】 The polymer oxygen index value is the minimum oxygen concentration (also known as oxygen index) required to maintain the combustion of the sample in the mixed air flow of oxygen and nitrogen required when the substance is ignited and burned for 50mm long or the burning time is 180s. 【Applicable Standards】  GB/T 2406.2-2009 【Instrument Features】 Full-color touch screen control, just set the oxygen concentration value on the touch screen, the program will automatically adjust to the oxygen concentration balance and emit a sound prompt, eliminating the trouble of manually adjusting the oxygen concentration; The use of step-by-step proportional valve greatly improves the control accuracy of flow, and the closed-loop control is adopted, and the oxygen concentration drift program is automatically adjusted back to the target value during the test, which avoids the disadvantages of the traditional oxygen index meter that cannot adjust the oxygen concentration in the test, and greatly improves the test accuracy. 【Technical parameters】  Imported oxygen sensor is adopted, the digital display of oxygen concentration does not need to be calculated, the accuracy is higher and more accurate, the range is 0-100% Digital Resolution: ±0.1% Measurement accuracy: 0.1 level The touch screen setting program automatically adjusts the oxygen concentration One-click calibration accuracy One-click ratio concentration The oxygen concentration is stable and automatically prompts the alarm With a chronograph function Experimental data can be stored You can query historical data Historical data can be cleared You can choose whether to burn 50mm or not Air source failure prompt Oxygen sensor failure tip Oxygen and nitrogen misconnection prompts Oxygen sensor aging tips Standard oxygen concentration input Combustion cylinder diameter can be set (two common specifications are available) Flow Adjustment Range: 0-20L/min(0-1200L/h) Quartz glass barrel: Choose from two sizes (inner diameter ≥75mm or inner diameter ≥85mm) Gas flow rate in the combustion cylinder: 40mm±2mm/s Overall dimensions: 650mm×400×830mm Test environment: ambient temperature: room temperature ~40°C; , Relative humidity: ≤70%; Input pressure: 0.25-0.3MPa Working pressure: nitrogen 0.15-0.20Mpa oxygen 0.15-0.20Mpa Specimen clips can be used on soft and rigid plastics, various building materials, textiles, fire doors, etc Propane (butane) ignition system, the ignition nozzle is made of a metal tube, and there is a nozzle with an inner diameter of Φ2±1mm at the end of the end, which can be bent freely. Can be inserted into the combustion cylinder to ignite the specimen, flame length: 16±4mm, size 5mm-60mm can be adjusted freely, Gas: Industrial nitrogen, oxygen, purity >99%; (Note: The air source and link header users bring their own) Tips: The oxygen index meter needs to use no less than 98% of the industrial-grade oxygen/nitrogen gas bottle as the gas source during the test, because the above gas is a high-risk transportation product, it cannot be provided as an accessory for the oxygen index meter, and can only be purchased at the user’s local gas station. (To ensure the purity of the gas, please purchase it at the local regular gas station) Power Requirements: AC220 (+10% )V, 50HZ Maximum working power: 150W Self-supporting material specimen clamp: can be fixed at the position of the combustion cylinder axis and can clamp the specimen vertically Non-self-supporting material specimen clamp: can hold the two vertical edges of the specimen to the frame at the same time (optional/applied to soft non-self-supporting materials such as textiles)