0-99.99% O2 Precision Portable Magnetic Cordless Oxygen Analyzer for High Purity Oxygen Test Runlai RL-B100H RL-B100H portable paramagnetic oxygen analyzer utilizes the paramagnetic magnetic force mechanical principle. It employs high-quality sensors to accurately measure oxygen concentrations ranging from 0.00% to 99.99%. It features fast response speed, high accuracy, good stability, simple operation, and long lifespan. With a single charge, it can operate continuously for