Exhaust gas detectors are analytical instruments that continuously monitor the concentration of harmful gases such as CO, CO₂, NOₓ, and hydrocarbons in combustion exhaust streams, safeguarding equipment, personnel, and the environment. The Exhaust Gas Detector market size was valued at approximately USD 4.2 billion in the base year 2025, and a robust growth outlook is projected with a CAGR of 7.5% for the market forecast period 2026‑2033, driven by tightening emission regulations, expanding industrial safety standards, and the rise of IoT‑enabled monitoring solutions. The market’s scope encompasses electro‑chemical, infrared, and catalytic sensor technologies across automotive, marine, power‑generation, and heavy‑industry applications. Asia‑Pacific remains the largest region, while the Middle East & Africa is emerging as the fastest‑growing market due to new petrochemical and offshore projects.