The Gas Flow Measurement System segmentation by type encompasses five primary technologies: differential‑pressure, thermal‑mass, Coriolis, ultrasonic, and positive‑displacement. Differential‑pressure meters dominate the market due to their robustness in high‑pressure pipelines, contributing roughly 35% of total revenue. Thermal‑mass flow meters, valued for low‑maintenance operation in steady‑state gas streams, account for about 25%, especially in utility and petrochemical settings. Coriolis meters, offering direct mass‑flow measurement and high accuracy, capture 20% of the market, driven by demand in LNG and refining where composition variability is critical. Ultrasonic devices, leveraging non‑intrusive wave propagation, represent 12% and are favored in large‑diameter ducts where pipe‑intrusion is undesirable. Positive‑displacement meters, though niche, provide precise low‑flow measurement for custody transfer, contributing the remaining 8%. Collectively, these sub‑types define the technology landscape, each shaping overall market size through distinct cost structures, performance attributes, and end‑user preferences.