Malawi Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Rwanda was US$16.9 Thousand during 2014, according to the United Nations COMTRADE database on international trade. Malawi Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Rwanda - data, historical chart and statistics - was last updated on May of 2024.