A potentiometric sensor is a type of chemical sensor that may be used to determine the analytical concentration of some components of the analyte gas or solution. These sensors measure the electrical potential of an electrode when no current is present.

How does a potentiometric biosensor work?

Potentiometric biosensors are developed by combining a biorecognition element (essentially an enzyme) with a transducer that senses the variation in protons (or other ions) amount, the recorded analytical signal being logarithmically correlated with the analyte concentration.

What are the types of potentiometric sensor explain it?

The main types of potentiometric sensors are membrane-based Ion-Selective Electrodes (ISE), Screen-Printed Electrodes, Ion-Selective Field Effect Transistors (ISFET), Solid-State devices, and Chemically modified electrodes (using, e.g., metal oxides or electrodeposited polymers as sensitive layers).