ガラス管振動子による微小密度差の測定

概要

論文の詳細を見る
At the measurement of liquid density, it is generally an important problem how the error influenced by temperatures can be decreased. As one of the countermeasures to it, an instrument was devised to measure the density diffence of liquid samples by using two vibrators of glass tube. The operating principle is as follows; a standard liquid of density is poured into one of the vibrators and a sample is poured into another, each period of vibration is measured with am electric counter, then the difference of density between the standard liquid and the sample is got from that of the period of vibration. By putting two vibrators in the same bath stirring water and measuring their values at the same time. the error was adle to be less than that of the single vibrator. As the result the density difference of water samples was measured with better precision than l ppm, only by controlling the room temperature at 20℃±0.5℃.
社団法人日本時計学会の論文
1977-09-20