When selecting a 10L oxygen concentrator, the most critical factor is the oxygen purity level, which must remain stable at 93% ± 3% even at the maximum flow rate of 10L/min. Buyers should prioritize units equipped with high-quality French imported molecular sieves to ensure long-term adsorption efficiency. Additionally, verify that the compressor is a pure copper oil-free compressor, which guarantees 24/7 continuous operation and a service life exceeding 25,000 hours. For clinical environments, ensure the noise level is kept below 50dB to maintain patient comfort.