Hong Kong Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Chad was US$2.89 Thousand during 2016, according to the United Nations COMTRADE database on international trade. Hong Kong Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Chad - data, historical chart and statistics - was last updated on June of 2024.