Temperature gradients were studied in two different pieces of density calibration equipment. Density is determined by hydrostatic weighing in water. The temperature of water and the surrounding air was determined with six temperature sensors. Also density measurements with two rectangular silicon prisms were performed. Density and temperature measurements were made when the water container was open to atmosphere and when it was closed.
Riski, K., & Kajaste, H. (2004). Study on temperature and density gradients in water for hydrostatic density determination. Measurement Science and Technology, 15(9), 1687-1693. https://doi.org/10.1088/0957-0233/15/9/003