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Ultrasonic
Transducers |
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Since Dapco's inception over twenty-five years ago, we have continued to manufacture
only the highest quality transducers. Due to our manufacturing flexibility and the
experienced in-house design staff, we are able to provide our customers with a large
selection of standard transducers which can meet the needs of most applications. We also
pride ourselves in providing customized transducers for those unique requirements,
generally at little or no extra cost, and with a quick turn-around in most cases.
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| Angle
Beam Transducers |
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Selecting an angle beam
transducer to inspect a particular material involves questions of frequency,
damping characteristics, and other technical aspects. But often, when
it comes down to choosing a transducer for a particular application, the
selection is limited simply by the physical geometry of the part or assembly
to be inspected. For this reason, Dapco offers a complete line of
miniature angle beam transducers. Angle beam transducer are single or
dual element transducers designed for weld inspection or flaw detection when
flaws have an angular orientation with respect to the material
surface. Weld inspections are performed using shear waves refracted
from a longitudinal wave by means of a wedge.
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| Contact
Transducers |
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Single
element contact transducers are longitudinal wave transducers designed for
general purpose manual ultrasonic inspection where test materials are
relatively flat and smooth. Contact transducers are ruggedly
constructed for extended service life under the roughest testing
conditions. Selection of the right contact transducer is critical to
accurate ultrasonic flaw detection and thickness gauging. To ensure
that you have the correct contact transducer for your needs, Dapco offers
a complete line of ultrasonic contact transducers to fit every
application. Each unit is designed, manufactured and tested to meet
the most exacting industry standards. As a user, you can expect the
highest quality and performance from our contact transducers.
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| Thickness
Gauging Delay Line Transducers |
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Delay line transducers are
recommended for thickness measurements of very thin materials on commercially
available thickness gauges and flaw detectors. They can also be used to
detect surface discontinuities.
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| Dual
Transducers |
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Dual transducers contain two
elements in a single housing, one exclusively for transmitting the signal and
the other exclusively for receiving the signal. Moreover, each element
is angled slightly toward the other which effectively focuses the sound
beam. This dual element feature results in better signal to noise ratios
as compared to single element transducers. It also allows for better
near-surface resolution, as well as improved sensitivity on both smooth and
rough surfaces. Typical applications for dual transducers are corrosion
monitoring, high temperature inspections, weld overlay inspection and cladding
bond/disbond inspection. Their small size also allows them to be used in
limited access areas and small diameter pipes.
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| Immersion
Transducers |
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The immersion transducers' design
allows them to operate in situations where the part to be tested is partially or
fully submerged in fresh water. Immersion Transducers are also used inside
water tanks for scanning purposes. Thus, scanning parts with irregular or
complex geometries is possible because of the conforming water path between the
probe and the material to be inspected. Superior near-surface resolution
can be achieved when compared to contact transducers. Typical applications
for immersion transducers are defect detection, on-line thickness gauging,
corrosion monitoring, velocity measurements and dimensional
analysis. In
choosing the frequency and element diameter of an Immersion
Transducer, you must consider the type of material being inspected,
the section thickness, the type of discontinuities you need to detect
and other inspection requirements. Moreover, if you require a
transducer with high sensitivity and penetration, we recommend the
medium damped transducer. On the other hand, if you need high
resolution and/or thickness gauging, then the highly damped transducer
should be your choice.
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