NOVELTY - Making (M1) a detector involves combining a chemochromic pigment with a polymer, where the chemochromic pigment is operably responsive to the combustible gas, and molding the chemochromic pigment and polymer into a rigid or pliable shape.    USE - For making detector useful for sensing the presence of combustible gas selected from hydrogen, carbon monoxide, acetylene, and methane (claimed).    ADVANTAGE - The method provides detector that is robust and easily modifiable for a variety of applications and environmental conditions, such as atmospheres of inert gas, and hydrogen gas, or in environments that have variable temperature, including high temperatures such as above 100 degrees C and low temperatures such as below -196 degrees C. The chemochromic detector is simple, low cost, portable, does not require power, and is simple to apply and remove; does not require any special expertise to use and provides for an unattended, chemochromic sensor capable of detecting and providing a response in the presence of a gas leak; does not require active monitoring or a power source and is easily removed after use; and identifies the presence of the combustible gas and provides discrete indicia of the presence of the gas to a person in proximity to the chemochromic detector, to a person monitoring cameras or fiber optic equipment, or to a person who inspects equipment for maintenance.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a detector for sensing the presence of a combustible gas comprising a molded structure including a chemochromic pigment interdispersed within a polymer matrix, where the chemochromic pigment is operably responsive to the combustible gas;    (2) combustible gas sensing textile material comprising a chemochromic pigment interdispersed within a textile polymer; and    (3) making (M2) the textile material (A1) involving fiber spinning the chemochromic pigment with aerogel or xerogel.    DESCRIPTION OF DRAWING(S) - The figure shows a flow chart of a process for making a hydrogen detector.