A system associated with a sensing roll for collecting sensor signals comprising: a plurality of sensors located at axially spaced-apart locations of the sensing roll, wherein each sensor enters a region of a first nip between the sensing roll and a mating roll during each rotation of the sensing roll, wherein a web of material travels through the first nip from an upstream direction to a downstream direction; an application station, comprising a rotatable applicator rod forming a second nip with the sensing roll, wherein each sensor enters a region of the second nip between the sensing roll and the applicator rod during each rotation of the sensing roll, and wherein each sensor generates a respective sensor signal comprising a pressure value upon entering a region of the second nip; a structure for generating a periodically occurring time reference associated with each rotation of the applicator rod; and a processor to receive the periodically occurring time reference and the respective sensor signal generated by each sensor as it moves through the second nip and, after receiving the respective sensor signal, the processor operates to: determine a particular one of the plurality of sensors which generated the respective sensor signal, based upon an amount of time that has elapsed between when the respective sensor signal was generated and a most recent time reference, identify one of a plurality of tracking segments, wherein each of the plurality of tracking segments is, respectively, associated with a different amount of elapsed time, the plurality of tracking segments comprising one of a plurality of circumferential segments on the applicator rod or a plurality of time segments of a period of rotation of the applicator rod, and store the respective sensor signal to associate the respective sensor signal with the identified one tracking segment. a plurality of sensors located at axially spaced-apart locations of the sensing roll, wherein each sensor enters a region of a first nip between the sensing roll and a mating roll during each rotation of the sensing roll, wherein a web of material travels through the first nip from an upstream direction to a downstream direction; an application station, comprising a rotatable applicator rod forming a second nip with the sensing roll, wherein each sensor enters a region of the second nip between the sensing roll and the applicator rod during each rotation of the sensing roll, and wherein each sensor generates a respective sensor signal comprising a pressure value upon entering a region of the second nip; a structure for generating a periodically occurring time reference associated with each rotation of the applicator rod; and a processor to receive the periodically occurring time reference and the respective sensor signal generated by each sensor as it moves through the second nip and, after receiving the respective sensor signal, the processor operates to: determine a particular one of the plurality of sensors which generated the respective sensor signal, based upon an amount of time that has elapsed between when the respective sensor signal was generated and a most recent time reference, identify one of a plurality of tracking segments, wherein each of the plurality of tracking segments is, respectively, associated with a different amount of elapsed time, the plurality of tracking segments comprising one of a plurality of circumferential segments on the applicator rod or a plurality of time segments of a period of rotation of the applicator rod, and store the respective sensor signal to associate the respective sensor signal with the identified one tracking segment. determine a particular one of the plurality of sensors which generated the respective sensor signal, based upon an amount of time that has elapsed between when the respective sensor signal was generated and a most recent time reference, identify one of a plurality of tracking segments, wherein each of the plurality of tracking segments is, respectively, associated with a different amount of elapsed time, the plurality of tracking segments comprising one of a plurality of circumferential segments on the applicator rod or a plurality of time segments of a period of rotation of the applicator rod, and store the respective sensor signal to associate the respective sensor signal with the identified one tracking segment.