Ion Selective Electrode (ISE) sensors are used to detect ionic concentration in aqueous solutions. Through discussions with several ISE sensor users and manufacturers, we have confirmed a fundamental issue with the ISE sensors currently on the market – electrode drift – which severely degrades the sensor’s operational performance and utility as a smart sensor.

In-situ ISE sensors have enormous potential across many industries (everything from environmental monitoring to medical/pharmaceutical controls), but the need for calibration to account for drift severely limits use of in-situ ISE sensors. ANB have identified an opportunity to investigate whether part of its novel electrochemical sensor platform can be used to address the issue of drift in ISE’s, in-situ, enabling the vast potential of the sensors to be realised in smart solutions. To address the issue of drift, ANB will utilise a novel means of verifying the electrochemical potential/performance of the reference electrode through the introduction of an additional voltammetric electrochemical measurement. The overall objective of this project is to research, develop and produce at least 5 modified laboratory scale prototype pH sensors utilising the novel self-calibration system over prolonged periods (up to 12 months).

Innovate UK

Innovate UK is the UK’s innovation agency. It works with people, companies and partner organisations to find and drive the science and technology innovations that will grow the UK economy. For further information visit www.innovateuk.gov.uk

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