Tanzania Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Botswana was US$726 during 2017, according to the United Nations COMTRADE database on international trade. Tanzania Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Botswana - data, historical chart and statistics - was last updated on May of 2024.