A healthy and friendly environment is one of the main national objectives in Egypt. This must be achieved to avoid the dangers of gas and vapor contaminants. Environmental pollution can be controlled by sensors that detect and measure gases and organic fumes. We prepared sensor for vapors of ethyl alcohol from conductive polymer nanocomposites CPNCs from doped polyaniline that was loaded with silver nanoparticles (NPs) with silver nanoparticles. The synthesized metallic nanoparticles and CPNCs were characterized by XRD, FTIR, TEM, and DLS.