The DRK304B digital oxygen index meter is a new product developed according to the technical requirements specified in the national standard GB/T2406-2009. It is suitable for the combustion performance test of homogeneous solid materials, laminated materials, foam plastics, fabrics, flexible sheets and films. . This instrument is used to determine the percentage of oxygen required for the polymer combustion process. The product can be used as a means to identify the flame retardancy of polymers, and it can also be used as a research tool-laboratory research on flame retardant formulations. The instrument uses imported high-precision sensors, which can be displayed digitally, with high accuracy and good reproducibility of test data. Main Specifications Measuring range: 0-100%O2 Resolution: 0.1%, Measurement accuracy: (±0.4)% Response time: <10S Digital display accuracy: 0.1%±1 word; Output drift: <5%/year; Operating conditions of the instrument Ambient temperature: -10℃—+45℃; Relative humidity: ≤85%; Supply voltage and power: 220V±15%, 50HZ, 100W; Use gas: GB3863 industrial gaseous oxygen; GB3864 industrial gaseous nitrogen; Pressure regulator valves are required for both bottles of gas; Input pressure: 0.25-0.4Mpa; Working pressure: 0.1Mpa.