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20 SPARES
Your gauge is complete with all the items required to get started and take measurements
(transducers must be ordered separately). Over the life of the gauge replacement items may be
required. The following replacement and optional items are available from your local Elcometer
NDT supplier or directly from Elcometer NDT.
Description
2.25 MHz 1/4" Potted Side Transducer
5 MHz 1/4" Potted Side Transducer
5 MHz 1/4" Potted Side High Damped Transducer
7 MHz 1/4" Potted Side High Damped Transducer
10 MHz 1/4" Potted Side Transducer
Ultrasonic Couplant, 120 ml (4 oz)
Ultrasonic Couplant, 360 ml (12 oz)
Ultrasonic Couplant, High Temperature 340°C (650°F), 60 ml (2 oz)
Ultrasonic Couplant, High Temperature 480°C (896°F), 60 ml (2 oz)
Note:
A
wide
range
www.elcometerndt.com for details.
21 TRANSDUCERS
Your gauge is capable of performing measurements on a wide range of materials, from various
metals to glass and plastics. Different types of material, however, have different properties. The
following paragraphs highlight the important properties of transducers which should be considered
when assessing a particular measurement task.
The best measurement condition is one where sufficient ultrasonic energy is sent into the material
being measured such that a strong, stable echo is received by the gauge.
Several factors affect the strength of ultrasound as it travels. These are outlined below:
21.1 Initial signal strength
The stronger a signal is to begin with, the stronger its return echo will be. Initial signal strength is
largely a factor of the size of the ultrasound emitter in the transducer. A large emitting area will send
more energy into the material being measured than a small emitting area. Therefore a 6 mm (1/4")
transducer will emit a stronger signal than a 3 mm (1/8") transducer.
21.2 Absorption and scattering
As ultrasound travels through any material, it is partly absorbed. If the materials through which the
sound travels have any grain structure, the sound waves will experience scattering. Both of these
effects reduce the strength of the waves.
Higher frequency ultrasound is absorbed and scattered more than ultrasound of a lower frequency.
It may seem therefore that using a lower frequency transducer might be better in every instance,
however low frequencies are less directional than high frequencies.
of
other
transducers
Sales Part No.
TX2M25CP-2
TX5M00CP-4
TX5M00CP-10
TX7M50CP-6
TX10M0CP-4
TC-24034-1
TC-24034-2
TC-24034-4
TC-24034-5
and
accessories
are
available
-
see
30
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