The Limit Gauge segmentation by application delineates five principal end‑use domains: Oil & Gas, Power Generation, Petrochemical, Water & Wastewater, and Marine. In the Oil & Gas sector, limit gauges are integral to pressure‑control loops in upstream drilling and downstream processing, accounting for roughly 35 % of total market revenue due to high‑pressure environments and stringent safety regulations. Power Generation contributes about 25 % as turbines and boiler systems rely on precise pressure limits to prevent over‑pressurization and equipment failure. Petrochemical facilities, with complex reaction vessels, represent 20 % of the market, driven by continuous compliance monitoring. Water & Wastewater treatment plants, focused on membrane and pump protection, hold 12 % of the market, reflecting moderate capital intensity. The Marine segment, encompassing shipboard engine rooms and ballast systems, occupies the remaining 8 %, where corrosion‑resistant designs are essential. Collectively, these application categories shape the overall Limit Gauge market size by reflecting distinct operational risk profiles and investment levels across industries.