抄録
A new vibrating-tube densitometer for measuring densities of fluids in the temperature range from ambient to 580 K and the pressure range up to 35 MPa is described. A novel design of driving and pick-up systems of a metal vibrating tube was employed. The driving system is based on passing the driving electrical signal directly to the electrically insulated vibrating tube, the photo-electric pick-up system employs glass-fibre optics with light source and sensor. New values of partial molar volumes at infinite dilution in water for several derivatives of benzene obtained by means of the densitometer are presented.
