Sri Lanka Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Liberia was US$98 during 2021, according to the United Nations COMTRADE database on international trade. Sri Lanka Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Liberia - data, historical chart and statistics - was last updated on June of 2024.