VISCOSITY MEASURING APPARATUS FOR HIGH TEMPERATURE FLUID

摘要

PURPOSE:To measure the viscosity of a fluid of a high temperature and low viscosity by providing a heat resistant and corrosion resistant vibrator at the tip of a vibration rod having a coil spring interposed while providing a vibration means and a displacement sensor at the other end thereof. CONSTITUTION:A coil spring 4b is interposed at the intermediate section of a vibration rod 4 while a platinum vibrator 5 of a heat and corrosion resistance is mounted at the tip thereof and a vibration coil 6 and a displacement sensor 7 are provided at the upper end thereof. As the vibrator 5 is vibrated through a coil 6 with a vibration control circuit 8, the vibration is attenuated depending on the viscosity resistance of the fluid 1. The amplitude value E is detected with a displacement sensor 6 and inputted into an arithmetic circuit 10, which calculates the ratio between the amplitude E and the amplitude Ea obtained when the vibrator 5 is vibrated in the air on the same condition and the viscosity of the fluid 1 is measured by a specified equation. Thus, the effect of the damping time characteristic is ignored to upgrade the accuracy significantly thereby enabling the measurement of the viscosity of a melted metal of a high temperature and a low viscosity or the like.