Our product owns a beautiful appearance, accurate measurement, stability of errors, high sensitivity, safety & reliability, long operating life, high anti-theft and antiseptic ability. It is applied in natural gas, urban pipeline gas, liquefied petroleum gas, marsh gas, straw gas and so on. Product conforms to the standards of GB/T********7 B-grade, EN***9:***8/A1:***6, OIML R*1:***5.