Ultrasonic sensors for high temperature applications

Many processes take place under conditions other than ambient, and chief am ong these is high temperature. Examples of high temperature industrial proc esses are resin transfer molding, molten metal infiltration and rheocasting of composite metals alloys. The interaction of waves with viscous fluids i s an additional complication adding to an already complicated problem of op erating a sensor at high temperature for extended periods of time. This rep ort attempts to provide an insight into the current state of the art of sen sor techniques for in-situ high temperature monitoring.