Abstract
PρT property data for working fluids and other functional fluids are fundamental to estimate the compressibility and/or enthalpies for their safety and significant applications. The present paper was to review the developments in the techniques for PρT property measurements of fluids in a single phase region. Many earlier or new innovations for direct or indirect precise measurements of volume or density changes were described. Moreover, it could be also expected that a large enough number of reliable experimental PρT property data in wider ranges of temperatures and pressures for accepted HC refrigerants will be accumulated in the near future.
