Đầu dò siêu âm độ dày siêu âm Elcometer 205, 206 & 208

When selecting a transducer, it is important to choose one which will meet the application, taking the following into consideration:

• The type of material to be tested
• The design of the transducer probe
• The measurement range
• Whether the shape of the substrate is flat or curved or hard to reach
• A range of frequencies and sizes are available to meet specific needs
• Straight and right angle transducers available as potted or microdot

Definitions:

• Microdot Transducer: The cable can be unplugged from the transducer and easily replaced on site should it become damaged
• Potted Transducer: Unlike the microdot transducers, the cables are hard wired into the transducer head
• Exxon Specification: The gauge and transducer combination must hit specified standards without missing the first cycle
• High Temperature Transducers: temperature up to 340°C (650°F)

Speed of Sound Through Materials

Elcometer Ultrasonic Thickness Gauges can be calibrated by the user for the appropriate material in two ways:

• Set the calibration to the thickness of the known standard of the same material
• Set the frequency calibration to the appropriate value using the velocity chart below: