Spinning drop interfacial tensiometer model TX500C is entry-level and basic type from USA KINO, which adopts such technologies as removable and both-ends-fixed sample tube sampling mode (RBSM), full-self-sealed quartz glass tube (FSGT) and build-in heating system. The instrument can be independently controlled via control panel or controlled by software, which are both simple and comfortable to operate. It is used to measure interface tension down to 10-6mN/m for analysis of dynamic interface tension, interface rheology and interfacial viscosity (oscillating drop method), surface elasticity, relaxation study, etc. It can be applied in fields of personal care product, tertiary oil recovery, micro emulsion, surfactant and more.