Zirconium Oxide Dual-Ion Flow Oxygen Analyzer & Detector, High Accuracy O2 Analyser with Sound Alarm, Customizable O2 Measurement Range Up to 25% Runlai Z100 RL-Z100 oxygen analyzer employs a zirconia dual-ion current sensor and is an intelligent analyzer with a microprocessor at its core. It can accurately measure oxygen concentration in nitrogen-oxygen mixtures. Measurement Principle: Dual Zirconia Measurement Range: 0~10/100/1000PPm/1.00%/25.00% 02 Measurement Accuracy: 0