Ion-selective electrodes enable the electrochemical measurement of the concentration of certain ions in solutions. They are frequently used in clinical measurements, quality control and environmental analysis. Every year, billions of measurements are performed for clinical applications alone. Conventional ISEs with an internal filling solution are expensive, fragile and require frequent calibration. They are also difficult to miniaturize. Here at innoME, we develop printed ISEs on film substrates to mass produce flexible, cost-effective disposable sensors that can be used in the field (e.g. in medical devices) or in distributed networks (e.g. in environmental analysis, Internet of Things). This is an exciting opportunity to develop a product that enables chemical measurements in places and applications that were never possible before.