Combination Longitudinal/Shear Mode Transducers
These transducers generate simultaneous longitudinal waves and shear waves in either single element, dual element or three element arrangement. They can be custom designed for different frequencies and element sizes.
Polymer (PVDF) Immersion Transducers
High frequency polymer (PVDF) transducers are focused immersion transducers with very broad bandwidth, whose element provides an excellent impedance match to water that results in a better transfer of sound energy. These transducers also
eliminate the need for the fused silica delay lines typically found in high frequency immersion transducers, removing the echo multiples associated with delay lines. Note: Polymer transducer center frequencies are based on the film thickness
of the polymer film element. Performance is highly dependent on pulser and cable characteristics and effective center frequency may be 15 - 25% lower than the nominal value.
|
Frequency
|
Nominal
Element Size
|
Part Number
|
Standard Focal Lengths
|
|
MHz
|
inches
| |
inches
|
|
15
|
0.25
|
PI15-2-RX.XX"
|
1.00
|
|
20
|
0.25
|
PI20-2-RX.XX"
|
0.50, 1.00, 1.50, 2.00
|
|
35
|
0.25
|
PI35-2-RX.XX"
|
0.50, 0.75, 1.00, 1.50, 2.00
|
|
50
|
0.25
|
PI50-2-RX.XX"
|
0.50, 0.75, 1.00, 1.50, 2.00
|
|
75
|
0.125
|
PI75-1-RX.XX"
|
0.50, 1.00
|
Note: Please replace X.XX" with the standard focal length of your choice.
• Due to the fact that polymer transducers are inherently broadband, their center frequency may be lower than the frequency indicated on the transducer
Captive Water Column Transducers
Captive Water Column Transducers incorporate a replaceable pliable membrane, which holds a small column of water in front of a flat or focused immersion transducer. The membrane will conform to the concave surface of the test piece. One of the
most common applications for these transducers is spot weld evaluation. Replaceable delay lines may be purchased for use with these transducers in spot weld or other special applications. Delays may be modified upon request to fit specific
sizes required. Ask for Spotweld Application Note.
Continuous High Temperature
Delay Line Transducer
This transducer can continuously withstand temperatures as high as 350°F (175°C) and pressures up to 85 PSIG. One typical application is to monitor the cure of materials in autoclave.
Part number is X2002, (2.25 MHz, 0.5 inch, 13 mm diameter)
Low Frequency Narrowband Transducers
Meant for use in pairs for through transmission in materials such as concrete, wood, and geological samples, these are available in frequencies of 50 kHz (X1021), 100 kHz (X1020), and 180 kHz (X1019). Recommended instruments are high voltage
pulser-receivers such as the Model 5058PR or 5077PR Square Wave Pulser
500 kHz Broadband/Highly Damped Transducers
This highly damped transducer measures the thickness of fiberglass, composites, and other attenuating materials. This transducer can also be used with a NWC-302 Nylon Wear Cap for flaw detection on thick or rough surfaced casting materials.
Part number is M2008, (1.5 inch, 38 mm diameter).
Variable Angle Beam Wedge
The Variable Angle Beam Wedge allows the user to adjust the incident angle from 0° to 50° to create refracted angles in steel from 0° to 90°. The wedge is to be used with the 0.50" x 1.00" Standard Angle Beam Transducers (see
Angle Beam Transducers).
Wedge Part Number = ABWX-2001