The principle of electrochemical sensors

The earliest electrochemical sensors were generally used for the monitoring of oxygen. In order to protect the safety of people, various electrochemical sensors are widely used in many static and mobile applications.

Electrochemical sensor principle: The chemical sensor is mainly composed of two parts: identification system, conduction or conversion system. A chemical parameter (usually the concentration) of the identification system against the analyte is linked to the conduction system. It mainly has two functions: Selectively interacts with the object under test, and converting the measured chemical parameters into a conductive system can produce a signal that responds. The molecular recognition system is a key factor in determining the entire chemical sensor. Therefore, the main problem of chemical sensor research is the choice of molecular recognition system and how the anti-molecular recognition system is continuous with the appropriate conduction system.

The chemical sensor's conduction system receives the recognition system's response signal and transmits the response signal to the electronic system for amplification or conversion output through the electrode, fiber, or mass-sensitive element in the form of changes in voltage, current, or light intensity, etc., ultimately enabling the identification system. The response signal turns into a signal that one can use as an analysis to detect the amount of analyte in the sample.