Botswana Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to China was US$34 during 2020, according to the United Nations COMTRADE database on international trade. Botswana Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to China - data, historical chart and statistics - was last updated on May of 2024.