Vietnam Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Zambia was US$5.3 Thousand during 2011, according to the United Nations COMTRADE database on international trade. Vietnam Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Zambia - data, historical chart and statistics - was last updated on May of 2024.