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Accensors's Foil sensor for pH monitoring

pH sensor S-301 PET 190 μm

Foil sensor for pH monitoring pH 4.5 – pH 9


The S-301 is a foil sensor with electrodes for electrochemical pH determination of samples. The accensors pH-sensor consists of two electrodes (a pH-sensitive and a non-sensitive Ag/AgCl reference electrode) on a transparent PET foil. The readings are taken by measuring the open circuit potential/voltage between both electrodes.



Potential (E) and pH have a linear relationship (between the operating range of pH 4.5 to pH 9) so the pH of an unknown analyte solution can be calculated using the pre-determined slope and an offset E value (E0 determined by measuring the potential in a calibration buffer of known pH). The reference electrode and overall sensor can be used in analytes with different chloride concentrations thanks to a solid-state electrolyte layer. Once used, the sensor must be kept hydrated for further application and not allowed to dry out.


The foil carrier is made of transparent PET material and the sensor is flexible, although care should be taken do not to bend the electrode spots. A connection between sensor and measurement electronics can be established via accensors connect or ZiF-connector. Contact pads are covered with oxidation protection. The data given refers to the use of the sensor in combination with the ACO accensors D-300 measurement device and our accensors iOS application. The measuring output will display the measured potential (in mV) or if the sensor is calibrated (one point software calibration at 21 oC or two-point at other temperature) output can be given as pH.


Note that this sensor is somewhat light-sensitive, and the long-term stability (during use) will be reduced when used in brightly lit conditions.



pH sensor S-302 PET 190 μm

Foil sensor for pH monitoring pH 5.5 – pH 10


The S-302 is a foil sensor with electrodes for electrochemical determination of pH of samples. The accensors pH-sensor consists of two electrodes (a pH-sensitive and a non-sensitive Ag/AgCl reference electrode) on a transparent PET foil. The readings are taken by measuring the open circuit potential/voltage between both electrodes. Potential (E) and pH have a linear relationship (between the operating range of pH 5.5 to pH 10) so the pH of an unknown analyte solution can be calculated using the pre-determined slope and an offset E value (E0 determined by measuring the potential in a calibration buffer of known pH). The reference electrode and overall sensor can be used in analytes with different chloride concentrations thanks to a solid-state electrolyte layer. Once used, the sensor must be kept hydrated for further application and not allowed to dry out.


The foil carrier is made of transparent PET material and the sensor is flexible, although care should be taken not to bend the electrode spots. A connection between sensor and measurement electronics can be established via accensors connect or ZiF-connector. Contact pads are covered with oxidation protection. The data given refers to the use of the sensor in combination with the ACO accensors D-300 measurement device and our accensors iOS application. The measuring output will display the measured potential (in mV) or if the sensor is calibrated (one point software calibration at 21 °C or two-point at other temperature) output can be given as pH.




All mechanical dimensions are valid at 25 °C ambient temperature, if not differently indicated. All data except the mechanical dimensions only have information purposes and are not to be understood as assured characteristics. Technical changes without previous announcement as well as mistakes reserved. Load with extreme values during a longer period can affect the reliability. Typing errors and mistakes reserved. Product specifications are subject to change without notice.


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