The global gas sensor market size is expected to reach USD 5.06 Billion in 2034 from USD 2.13 Billion in 2025, growing at a CAGR of 10.09 during 2026-2034.This market is expanding steadily as industries increasingly prioritize environmental monitoring, workplace safety, and emission control. Gas sensors are widely used to detect hazardous gases and monitor air quality across industrial facilities, healthcare environments, residential buildings, and transportation systems.