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Title: Apparatus and method for high temperature viscosity and temperature measurements

A probe for measuring the viscosity and/or temperature of high temperature liquids, such as molten metals, glass and similar materials comprises a rod which is an acoustical waveguide through which a transducer emits an ultrasonic signal through one end of the probe, and which is reflected from (a) a notch or slit or an interface between two materials of the probe and (b) from the other end of the probe which is in contact with the hot liquid or hot melt, and is detected by the same transducer at the signal emission end. To avoid the harmful effects of introducing a thermally conductive heat sink into the melt, the probe is made of relatively thermally insulative (non-heat-conductive) refractory material. The time between signal emission and reflection, and the amplitude of reflections, are compared against calibration curves to obtain temperature and viscosity values.
 [1];  [2];  [1];  [1]
  1. (Mississippi State, MS)
  2. (Houston, TX)
Issue Date:
OSTI Identifier:
Mississippi State University (Mississippi State, MS) CHO
Patent Number(s):
US 6296385
Contract Number:
Research Org:
Mississippi State University (Mississippi State, MS)
Country of Publication:
United States
apparatus; method; temperature; viscosity; measurements; probe; measuring; liquids; molten; metals; glass; similar; materials; comprises; rod; acoustical; waveguide; transducer; emits; ultrasonic; signal; reflected; notch; slit; interface; contact; hot; liquid; melt; detected; emission; avoid; harmful; effects; introducing; thermally; conductive; heat; sink; relatively; insulative; non-heat-conductive; refractory; material; time; reflection; amplitude; reflections; compared; calibration; curves; obtain; values; molten metals; calibration curve; similar material; ultrasonic signal; temperature measurements; refractory material; heat sink; molten metal; thermally conductive; hot liquid; temperature measurement; calibration curves; materials comprises; temperature liquid; harmful effects; conductive heat; materials comprise; temperature measure; temperature liquids; sonic signal; similar materials; /374/73/