This paper presents an ultrasonic method to measure small concentrations of water in
lubricating oil. It uses an ultrasonic measurement cell composed by a piezoceramic emitter …

The presence of water in lubricating oil is destructive even in very small quantities. The
ultrasonic measurement is an alternative method to find a solutions for detecting and …

This work deals with a transmission-reception ultrasonic technique for the real-time
estimation of the water content in water-in-crude oil emulsions. The working principle is the …

The determination of the complex reflection coefficient of ultrasonic shear-waves at the solid-
liquid interface is a technique employed for the measurement of the viscoelastic properties …

The present work contains two parts. In the first part, high temperature integrated ultrasonic
transducers (IUTs) made of thick piezoelectric composite films, were coated directly onto …

The control of lubricating oil degradation is usually done by physical-chemical techniques.
However, these techniques are not practical because they are time-consuming and …

The extraction process of crude oil requires addition of water, resulting in complex
emulsions, in which the phases must be separated before the petrochemical processing …

Measurements of ultrasonic attenuation and velocity in milk and low concentration water-in-
oil (W/O) emulsion were conducted, using a measurement cell with a double-element …

Viscosity of refrigerant-dissolved oil was estimated by ultrasonic measurement. An active 5--
MHz ultrasonic probe and a reflective plate were placed in the oil, and speed of sound was …

Measurements of the ultrasound propagation speed in engine oils as a function of
temperature in the range from 8 degC to 153 degC were performed. The data obtained are …