A device for the precise and accurate potentiometric pH measurements in situ. Air within the enclosure is heated to a predetermined temperature to kill organisms and cause harmful substances in the structure to migrate into the ambient air. The call processing software module performs modulation and demodulation of voice and data streams using one or more air interface standards. In addition, in response to a second write voltage potential being applied between the second and third electrode regions, the third electrode region changes its own shape such that in response to the pre-specified read voltage potential applied between the first and third electrode regions, said sensing current does not flow between the first and third electrode regions. The cooked, uncured pork products are substantially free of nitrates andor nitrites.