Patent ID: 8876977
Filing Date: 2014-11-04
Classification: B08B,G01N

Abstract:
1. A method for cleaning the U-tube of the measurement cell of a densimeter, the measurement cell comprising: an isothermic enclosure having a measurement chamber closed by a stopper surrounded by a resilient seal; a U-tube disposed within the measurement chamber for containing a sample being analysed, the U-tube secured to the stopper at a base of the U-tube which is formed by free ends which project outwardly from the measurement chamber to permit the injection of the sample via an injection opening and evacuation of the sample via an evacuation opening; and means for causing the U-tube to vibrate; said method comprising the steps of: analyzing a sample to determine the density of the sample; injecting a rinsing solvent into the injection opening of the U-tube; and subjecting the stopper to ultrasonic waves by actuation of a transducer different from the means for causing the U-tube to vibrate, the transducer secured to the stopper and operable to generate and transfer acoustic energy to the stopper to cause the U-tube to vibrate with propagation of the ultrasonic waves into the rinsing solvent.