Zambia Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Botswana was US$329 during 2015, according to the United Nations COMTRADE database on international trade. Zambia Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Botswana - data, historical chart and statistics - was last updated on May of 2024.