UltrasonicsGE Inspection Technologies

Coarse grain Probes„Longitudinal“ probes for testing coarse grained material, primarily cast material, austenite and austenitic welds ect.

GE Inspection Technologies Ultrasonics

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We reserve the right to technical modifi cations without prior notice. ©2004 General Electric Company. All rights reserved.GEIT-20103GB (08/04)

Coarse grain probesGenerally speaking coarse grained material

is only to be tested using selected special

probes because the noise caused by the

grain structure in most cases reaches the

same indication amplitude as the echoes

from small refl ectors. There are therefore a

number of probes available, particularly for

testing austenitic welds, which, depending

on the test specimen, produce more or less

satisfactory results.

We have engaged ourselves very intensely

with this problem and have examined a

large range of test material using diffe-

rent focussed single crystal probes and

TR probes and whereby we were strongly

supported by the manufacturers of aus-

tenitic materials. The examination resul-

ted in the production of probes which, in

our experience, produce, on the average,

the best results.

With the examinations the probes were

primarily evaluated with regards to

having as large a signal to noise ratio as

possible i.e. the indications from refl ec-

tors should extend as far as possible

above the grain noise.

All the probes generate longitudinal

waves.

Normal probes with exchangeable membrane

Code Frequency(MHz)

Crystal(mm) Ø

Contact face approx. (mm)

Remarks

K 0.5 SK 1 SK 1 SM

0.511

343428

404033

very good damping good sensitivity very good signal to noise ratio

B 0.5 SLB 1 SL

0.51

3434

4040

very good sensitivity good damping , good signal to noise ratio

K 1 SCK 1 SC

12

2424

3030

piezocomposite transducer best sensitivity and signal to noise ratio

Angle beam probes - single crystal series, piezocomposite transducer

Code Angle(º)

Frequency (MHz)

Crystal(mm) Ø

Contact faceca. (mm)

Depth range(mm)

Probe cablerequired

WRY 45WRY 60WRY 70

456070

222

242424

48 x 2548 x 2548 x 25

5 - 1005 - 805 - 55

MPKL 2

WSY 45-2WSY 60-2WSY 70-2

456070

222

101010

28 x 1328 x 1328 x 13

6 - 254 - 203 - 15

MPKL 2

WSY 45-4WSY 60-4WSY 70-4

456070

444

101010

28 x 1328 x 1328 x 13

3 - 303 - 202 - 15

MPKL 2

Angle beam probes - TR series, piezocomposite transducer

Code Angle(º)

Frequency (MHZ)

Crystal(mm) Ø

Contact faceca. (mm)

Depth range(mm)

Probe cablerequired

VRY 45VRY 60VRY 70

456070

1,81,81,8

22 x 1022 x 1022 x 10

53 x 2953 x 2953 x 29

15 - 7010 - 60 5 - 45

SEKL 2

VSY 45VSY 60VSY 70

456070

444

10 x 510 x 510 x 5

30 x 1530 x 1530 x 15

2 - 301.5 - 201.5 - 20

SEKN 2

Accessories: 1. Wedge for beaming longitudinal waves at 45º (Wedges for other refraction angles on request)

KSY 45 für 34 mm crystalKSMY 45 für 28 und 24 mm crystal

2. Membrane ES 57 für 34 mm crystalES 45 für 28 und 24 mm crystal

3. Probe cable PKLL2