Accurate determination of density, surface tension, and vessel depth using a triple bubbler system

A triple bubbler sensor was developed for use in high temperature molten salt systems used in pyroprocessing to determine the density, surface tension, and depth of the molten salt. Preliminary bubbler testing was performed in aqueous solutions to calibrate and validate the bubbler sensor. Independently determined fluid property values and depths were compared to the calculated values and the percent differences were less than 0.16%, 3.38%, and 0.31% for density, surface tension, and depth, respectively. In addition, uncertainties were within 0.04%, 1.25%, and 0.15% for density, surface tension, and depth, respectively.