Industrial O2 Gas Analyzer High Accuracy Metal Oxygen Detector Featuring Digital LCD Display and Sound Alarm, Customizable Available Runlai Z100 zirconia Product Specifications Measurement Principle: Zirconia Variable Frequency Ion Current Measurement Range: 0.00PPm to 25.00% (auto-switching) Accuracy: ≤±3%FS (0.00~10ppm) ≤±2%FS (0~100ppm) ≤±2%FS (0~1000ppm) ≤±1%FS (1000ppm~25%) Storage Interval: In seconds (adjustable) Number of Storage Points: 65,536 Stability: Zero drift ≤