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16.4 TEMPERATURE OF THE MATERIAL
When it is necessary to measure on surfaces that are exceedingly hot, special high-temperature
transducers may be necessary. Additionally, care must be taken when performing a ‘Calibration to Known
Thickness’ with a high temperature application - see “Measuring hot surfaces” on page 44.
16.5 SELECTING THE CORRECT TRANSDUCER
Elcometer NDT have a complete range of transducers to meet your requirements, including:
• A range of frequencies and sizes
• Straight and right angle
• Transducers available as potted or microdot transducers:
Potted transducers - transducer cable is permanently fixed to the transducer head.
Microdot transducers - transducer cable is fixed to the transducer head by a connector - allows
transducer heads to be replaced quickly and easily.
• High temperature transducers - temperature up to 480ºC (896ºF)
When selecting a transducer, it is important to choose one which will best meet your application, taking into
consideration:
• The measurement range
• The type of material to be tested
• The design of the transducer probe type
The following table gives guidance on the type of transducer required for a range of measurement tasks:
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