Eddy Current Array (ECA) Probes

An Eddy Current Array (ECA), in its fundamental form, is a series of single coils arranged in a row or rows, allowing much larger single-pass coverage than a conventional single-coil eddy current probe. Because of the larger coverage, inspection times are significantly improved.

Multiplexing is used to enable/disable the coils in a specific sequence. UniWest’s RCAT array probes feature a miniature multiplexer built right into the probe.

Below are examples of “basic” ECA probes, but as you can imagine, most applications demand a somewhat custom probe to accommodate specific part geometry and required coverage demands. Please contact our ECA experts to discuss your specific application.

Advantages compared to conventional ETC probes

Larger single-pass coverage
Faster inspection times
C-scan imaging & encoding improves flaw detection and visualization
Complex shapes can be efficiently inspected using custom probes matching the part profile

RCAT-24X-CONFORM-1.2” IM:

24 differential orthogonal (cross wound) coils
Frequency range: 500 kHz – 2 MHz
Built-in multiplexer
Coverage: 1.2”
Encoder for C-scan display of coverage

RCAT-24P-CONFORM-2.4” IM:

24 absolute pancake coils
Frequency range: 100 kHz – 500 kHz
Built-in multiplexer
Coverage: 2.4”
Encoder for C-scan display of coverage

RCAT-32FPC-FLEX-2.4” IM Flexible Array Probe:

TechSpec (pdf)
32 absolute bridge coils (150 x 150mil spacing)
Frequency Range: 50 kHz to 2 MHz
Coverage: 2.4 inches
Built-in multiplexer
Removable encoder with move-able position wheel
Encoder Resolution: 4,172 counts per inch (.0002 inch per count)
Compatible with both UniWest EVi and EddyView II

RCAT-16X:

16 differential orthogonal (cross wound) coils
Frequency range: 500 kHz – 2 MHz
Built-in multiplexer
Coverage: 0.75”
Pivoting head

RCAT-16P:

16 absolute pancake coils
Frequency range: 500 kHz – 2 MHz
Built-in multiplexer
Coverage: 0.75”
Pivoting head

Cables (sold separately):

P/N: 75915-6 6’ cable, 12-pin Lemo to 27-pin Fischer (UniWest EVi)
P/N: 75995-6 6’ cable, 12-pin Lemo to 16-pin Lemo (EddyView II)
P/N: 75915-10 10’ cable, 12-pin Lemo to 27-pin Fischer (UniWest EVi)
P/N: 75995-10 10’ cable, 12-pin Lemo to 16-pin Lemo (EddyView II)
P/N: 75915-20 20’ cable, 12-pin Lemo to 27-pin Fischer (UniWest EVi)
P/N: 75995-20 20’ cable, 12-pin Lemo to 16-pin Lemo (EddyView II)

Reference Standards (sold separately):

P/N: 101222A, Aluminum, 3 notches, 0.008” 0.020” and 0.040” Deep
P/N: 101222T, Titanium, 3 notches, 0.008” 0.020” and 0.040” Deep
P/N: 101222S, 4130 Steel, 3 notches, 0.008” 0.020” and 0.040” Deep

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