Abstract
Three instruments, such as an adiabatic vapor-hydration calorimeter, an adiabatic water-hydration calorimeter, and an instrument for measuring equilibrium vapor pressure, have been made in order to clarify zeolite characters for the development of a zeolite-water heat pump systems. Structural details for these three instruments were shown with handling procedures for sample zeolites. It is emphasized that precise description on states of a zeolite, especially on the water content, is needed to obtain useful data for investigating the zeolite-water system.
