Table of Contents
Advertisement
Material being
Mode
measured
Material
ECHO-ECHO
thickness
(E-E)
measured
through a coating
Thin materials
PULSE-ECHO
(P-E)
High
PULSE-ECHO
temperature
and
ECHO-ECHO
Noisy material
Measuring
extreme
curvatures or
areas of
restricted access
For full details of the Elcometer NDT range of transducers contact your local Elcometer NDT
supplier, or visit the Elcometer NDT website www.elcometerndt.com
Transducer type
required
Special high damped
transducers are
required; typically the
3.5MHz, 5MHz, and
7.5MHz hi damped
transducers.
High frequency
transducers are
required; typically the
7.5MHz and 10MHz
models with extra
resolution.
Special 2.25MHz and 5
MHz High temperature
transducers are
required.
Select a higher
frequency transducer to
reduce this noise -
7.5MHz and higher for
better resolution.
Higher frequency
transducers with smaller
diameters are required.
The smallest diameter
uses 3/16" crystals with
a contact area of .250"
Notes
These transducers are suitable
for use in both pulse-echo and
echo-echo modes. This enables
you to measure overall material
thickness using the Echo-echo
mode, and then switch to pit
detection mode (Pulse-echo)
without changing transducers.
The higher frequencies provide
greater resolution and a lower
minimum thickness rating overall.
Echo-echo mode will eliminate
error caused by temperature
variations in the delay line of the
transducer.
Materials such as titanium,
stainless steel, and aluminium
may produce surface noise. This
is a signal that appears at the
surface of the material when
using a dual element delay line
probe.
32
Advertisement
Table of Contents
