Withinelectronics, anElectrolyte–insulator–semiconductor (EIS) sensor is asensor that is made of these three components:^[1]

• anelectrolyte with the chemical that should be measured
• aninsulator that allows field-effect interaction, without leak currents between the two other components
• asemiconductor to register the chemical changes

The EIS sensor can be used in combination with other structures, for example to construct alight-addressable potentiometric sensor (LAPS).

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