To accurately measure material thickness at elevated temperatures has always been difficult. A calibration carried out at room temp is not ideally suitable for measuring on material of a higher temp, Unless the gauge has Temperature Compensation or an extensive multiple cal is preformed.
Oceanscan’s 37DL Plus gauges have this built in and are supplied with a high temp probe. The ideal way to accurately perform thickness gauging across a wide range of temperatures.
Temperature compensation allows the 37DL Plus to compensated for the change in sound velocity due to temperature.The sound velocity in Steel changes approximately 1% per 1000F (550C) change in temperature as recommended by ASME Standard E 797-95. Read more...
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