Segmentation by type distinguishes the underlying generation technologies and functional configurations that shape the Portable Medical Oxygen Concentrators market. The dominant Pressure Swing Adsorption (PSA) architecture, responsible for roughly 60 % of unit shipments, leverages zeolite‑based molecular sieves to deliver >90 % oxygen purity; its scalability supports both low‑flow (0.5–2 L/min) and high‑flow (up to 5 L/min) variants, influencing price‑point differentiation. Membrane‑based concentrators, comprising about 25 % of the market, employ polymeric selective barriers, offering lighter weight and quieter operation but typically limited to ≤2 L/min flow, positioning them for home‑care and travel niches. Emerging Hybrid models—integrating PSA cores with auxiliary battery‑boosted compressors—capture the remaining 15 % and address use‑cases that demand both high‑flow capacity and extended runtime, such as emergency response. Within each technology, sub‑categories (e.g., battery‑only, AC‑only, dual‑power) further allocate market share based on power‑source flexibility, directly affecting total addressable market size for each type.