Smartphone-Based Identification of Unknown Liquids via Active Vibration Sensing

ArXi:2603.28787v1 Announce Type: cross Traditional liquid identification instruments are often unavailable to the general public. This paper shows the feasibility of identifying unknown liquids with commercial lightweight devices, such as a smartphone. The key insight is that different liquid molecules have different viscosity coefficients and therefore must overcome different energy barriers during relative motion. With this intuition in mind, we