A PAN is easily constructed by carrying out mutual authentication with a plurality of equipment in a home. The method comprises generating a binary tree containing a first image. The reveal station employs a game presentation including various graphics and audio effects to show sweepstakes results in an entertaining fashion. Each subsequent call retrieves a packet of data, picking up where the previous call left off without an overlap. Sensor performance is demonstrated for an exemplary amine sensor for the aliphatic amines tert-butylamine, diethylamine and triethylamine and also for pyridine and aniline.