1. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Toward An Ultrasonic Sensor for Pressure Vessels J. Pressure Vessel Technol. 2008;130(2):021501-021501-5. doi:10.1115/1.2892030 Sketch of system showing pressure vessel, target, transducer housing, and matching layer Figure Legend:

2. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Toward An Ultrasonic Sensor for Pressure Vessels J. Pressure Vessel Technol. 2008;130(2):021501-021501-5. doi:10.1115/1.2892030 Transducer housing Figure Legend:

3. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Toward An Ultrasonic Sensor for Pressure Vessels J. Pressure Vessel Technol. 2008;130(2):021501-021501-5. doi:10.1115/1.2892030 Temperature dependence of sensitivity for selected piezoelectric materials. PZT is lead zinconate titanate (TC ∼ 350°C); LN is lithium niobate (TC ∼ 1250°C); PMN is lead metaniobate (TC ∼ 570°C). Courtesy of Mahesh C. Bhardwaj and Mikel E. Langron, Ultran Laboratories, Inc., Boalsburg, PA. Figure Legend:

4. Date of download: 5/29/2016 Copyright © ASME. All rights reserved. From: Toward An Ultrasonic Sensor for Pressure Vessels J. Pressure Vessel Technol. 2008;130(2):021501-021501-5. doi:10.1115/1.2892030 Oscilloscope traces (V versus μs) for signals from receiver with gain adjusted to keep signals approximately the same height. The transducer was mounted on a 25mm thick steel sample and tested in pulse-echo repeatedly to elevated temperature without significant degradation. Figure Legend: