Abstract: A differential pH probe design uses a container having an outer surface and an inner volume, where the inner volume is divided into a first chamber and a second chamber. A first pH-sensitive area is located on the outer surface of the first chamber where the first pH-sensitive area is configured to be exposed to a sample. A second pH-sensitive area is located on the outer surface of the second chamber where the second pH-sensitive area is shielded from the sample and is exposed to a buffer solution. A first electrode is configured to detect a first voltage in the first chamber and a second electrode is configured to detect a second voltage in the second chamber. Circuitry is coupled to the first and second electrodes and configured to process the first voltage and the second voltage to determine a pH of the sample.

Abstract: A method for manufacturing a differential pH probe body by forming a plurality of tube shaped segments where each of the plurality of tube shaped segments comprises a first section formed from a pH sensitive material and a second section formed from a non-pH sensitive material. Coupling the plurality of tube shaped segments together end-to-end to form the differential pH probe body where the pH sensitive sections alternate with the non-pH sensitive sections and then closing one end of the differential pH probe body.

Abstract: A differential pH probe design uses a container having an outer surface and an inner volume, where the inner volume is divided into a first, a second, and a third chamber. A first pH-sensitive area is located on the outer surface of the first chamber where the first pH-sensitive area is configured to be exposed to a sample. A second pH-sensitive area is located on the outer surface of the second chamber where the second pH-sensitive area is shielded from the sample and is exposed to a first buffer solution. A third pH-sensitive area is located on the outer surface of the third chamber where the third pH-sensitive area is shielded from the sample and is exposed to a second buffer. A first electrode is configured to detect a first voltage across the first pH-sensitive area, a second electrode is configured to detect a second voltage across the second pH-sensitive area and a third electrode is configured to detect a third voltage across the third pH-sensitive area.

Abstract: A differential pH probe design uses a container having an outer surface and an inner volume, where the inner volume is divided into a first chamber and a second chamber. A first pH-sensitive area is located on the outer surface of the first chamber where the first pH-sensitive area is configured to be exposed to a sample. A second pH-sensitive area is located on the outer surface of the second chamber where the second pH-sensitive area is shielded from the sample and is exposed to a buffer solution. A first electrode is configured to detect a first voltage in the first chamber and a second electrode is configured to detect a second voltage in the second chamber. Circuitry is coupled to the first and second electrodes and configured to process the first voltage and the second voltage to determine a pH of the sample.