Non-contact sensors are devices that detect and measure physical properties or changes without requiring direct contact with the object being sensed. These sensors utilize various principles such as capacitive, inductive, thermal, optical, and magnetic fields to perform their functions. They are widely used in applications where avoiding wear and tear is crucial, as they eliminate mechanical failure by not requiring physical interaction. This makes them ideal for measuring liquid levels, positions, and other parameters in a safer, cleaner, and more efficient manner