Fiji Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Tonga was US$3.5 Thousand during 2022, according to the United Nations COMTRADE database on international trade. Fiji Exports of hydrometers, thermometers, pyrometers, barometers, hygrometers to Tonga - data, historical chart and statistics - was last updated on May of 2024.