Method of and apparatus for measuring the true contents of a cylinder of gas under pressure

摘要: There is provided a method of, and apparatus for, measuring the mass of gas under pressure using piezoelectric oscillator. The contained within vessel (100) having fixed internal volume (V) oscillator (202) immersed in (100). comprises: a) utilising said to measure density high-pressure (100); b) determining, from measurement vessel, By providing such method, true contents (i.e. mass) fluid as cylinder can be measured directly without need compensate for factors temperature or compressibility. This allows determination through direct derivation cylinder, reducing additional sensors complex calculations performed.