Hong Kong Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Laos was US$3.75 Thousand during 2020, according to the United Nations COMTRADE database on international trade. Hong Kong Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Laos - data, historical chart and statistics - was last updated on June of 2024.