Estonia Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Bhutan was US$1.05 Thousand during 2013, according to the United Nations COMTRADE database on international trade. Estonia Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Bhutan - data, historical chart and statistics - was last updated on May of 2024.