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Below there are shown two photos and a short description of the instruction use of a
transducer.
The left figure is a bottom view of a typical transducer. The two semicircles are visibly
separated in the middle of the surface. One of the semicircles is conducting the ech-
oed sound back into the transducer. When the transducer is placed against the mate-
rial being measured, this is the area directly beneath the centre of the measured sur-
face.
The below figure is a top view of a typical transducer.
It is pressed against the top with the thumb or the index finger to hold the transducer
in place. Only moderate pressure is sufficient to keep it stationary. Its surface must
be placed flat against the surface of the material.
Table 3-1 Transducer selection
Model
Freq
MHz
ATU- US 01 2,5 14 3.0mm～300.0mm
ATU- US 09 5
ATU- US 10 5
ATU- US 02 7
ATB-US01
5
ATB- US 02 5
3.2 Conditions and preparation of surfaces
At any kind of ultrasonic measurement, the shape and roughness of the surface be-
ing tested are of paramount importance. Rough and uneven surfaces may limit the
8
Ø
Measurement Range Lower
mm
(in steel）
40mm(grey
Cast iron HT200)
10 1.2mm～230.0mm
(in steel)
10 1.2mm～230.0mm
(in steel）
6
0.75mm～80.0mm
(in steel）
6
0.75mm～80.0mm
(in steel）
12 3～200mm
(in steel)
Description
limit
20mm
For thick, highly
attenuating
or highly scattering
materials
Φ20mm×
normal
3.0mm
measurement
Φ20mm×
Normal Measurement
3.0mm
/ 90°angle
Φ15mm×2.0mm For thin pipe
walls or small
curvative pipe
walls
Φ15mm×2.0mm For thin material
30mm
For high tem-
perature (lower
than 300°C)
measurement
TN_US-BA-e-1814
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