Abstract
Surface tension measurements of fluids under high pressure is described here. A topic focused on is the fluorocarbon refrigerants and altemative refrigerants, since the authors have much experience for these fluids. The principle and the experimental apparatus of capillary rise method is briefly explained, since this method is widely utilized to measure the surface tension under high pressure. This article introduces the summary of the experimental results and correlation for surface tension of HCFCs and HFCs which are the candidate fluids for alternative refrigerants.