An Electrochemical Nano Biosensor is a device used to detect biochemical compounds such as proteins, hormones, toxins, and other molecules. It utilizes nanotechnology and electrochemical principles to detect the presence of these compounds with high sensitivity and accuracy. The biosensor is composed of a nano-scale electrode, an interface, and a recognition element, which can be a molecule, antibody, or enzyme. When a target molecule binds to the recognition element, it triggers a detectable electrochemical signal, enabling detection of the target in real-time.