... current tester with fast response and high sensitivity High Purity Oxygen AnalyzerFeatures:•New pattern, long-life, conversion ... high purity oxygen production, metallurgy, health, petrochemicals, and power electronics industries.Specifications:Range: 10-99.99%/50-99.99%/90-99.99%/97%-99.99%O2 ... ;auto-ranging Accuracy: ±0.5% of FS range, ±0.1% of 90-99.99% ...