A carbon dioxide detector including a sensor component, where the sensor component has a colorimetric indicator salt of a colorimetric pH indicator and a lipophilic phosphonium quaternary cation, a transparent polymer vehicle or a plasticizer not being in a mixture with the colorimetric indicator salt and a porous memory, a porous polymer membrane in one instance, the colorimetric indicator salt being deposited on a surface of the porous polymer membrane the colorimetric indicator salt deposited on the porous polymer membrane does not include a transparent polymer vehicle or a plasticizer, and carbon dioxide detection systems using the detector.
