Within

electronics Electronics is a scientific and engineering discipline that studies and applies the principles of physics to design, create, and operate devices that manipulate electrons and other Electric charge, electrically charged particles. It is a subfield ...

, an Electrolyte–insulator–semiconductor (EIS) sensor is a

sensor A sensor is often defined as a device that receives and responds to a signal or stimulus. The stimulus is the quantity, property, or condition that is sensed and converted into electrical signal. In the broadest definition, a sensor is a devi ...

that is made of these three components: * an

electrolyte An electrolyte is a substance that conducts electricity through the movement of ions, but not through the movement of electrons. This includes most soluble Salt (chemistry), salts, acids, and Base (chemistry), bases, dissolved in a polar solven ...

with the chemical that should be measured * an insulator that allows field-effect interaction, without leak currents between the two other components * a

semiconductor A semiconductor is a material with electrical conductivity between that of a conductor and an insulator. Its conductivity can be modified by adding impurities (" doping") to its crystal structure. When two regions with different doping level ...

to register the chemical changes The EIS sensor can be used in combination with other structures, for example to construct a light-addressable potentiometric sensor (LAPS).

References

Sensors {{Electronics-stub