A multiphase-liquid level sensing system for sensing a layer depth and thickness of a liquid of a first phase that floats on a liquid of a different second phase includes an elongated stem that defines an elongated cavity. A central profile is created for a user which includes user information that can be passed back or otherwise utilized by websites The user information may include the user’s username, password, contact information, personal information, marketing preferences, financial information, etc. The image data corresponding to the flag is then filtered by a predetermined method if the extracted flag indicates a need for the loop-filtering. Relative movement of the first and second tubes in response to an impact force applied to one of the first and second tubes causes the locking structure to become wedged between the ramp and the surface, and at least a portion of the impact force between the first and second tubes is transmitted through the first and second elongated areas of contact.