Ultrasonic device and method for measuring the temperature of a fluid in an enclosed space

摘要: An ultrasonic wave is transmitted from outside the vessel (10) and propagated through walls of fluid (11) contained in vessel. At a specific observation point vessel, (1) directly fluid, (2) after reflection, are detected. The time interval between reception at that reflection determined. temperature deduced interval, length path knowledge variation speed sound fluid. Application especially to thermal monitoring nuclear reactors.