The catalytic bead sensor is a kind of sensor which is primarily employed for combustible gas identification and detection. The catalytic bead sensor contains two fine platinum wire coils, each embedded in a bead of alumina. It is connected electrically in a Wheatstone bridge circuit. The catalytic-type bead gas sensor primarily contains two elements, viz. a detector element, which contains catalytic material and is sensitive to combustible gases, and a compensator element, which is inert. In terms of gas type, the global catalytic bead sensor market can be segmented into carbon dioxide, oxygen, carbon monoxide, ammonia, nitrogen oxide, chlorine, and hydrogen sulfide. In terms of end-use industry, the market can be segmented into water and wastewater treatment, metal, mining, oil & gas, automotive, medical, environmental monitoring, and industrial. In terms of geography, the market for catalytic bead sensor has been segmented into Asia Pacific, Europe, North America, Latin America, and Middle East &Africa.