Sweden Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Seychelles was US$237 during 2015, according to the United Nations COMTRADE database on international trade. Sweden Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Seychelles - data, historical chart and statistics - was last updated on June of 2024.