Low Frequency Probes

Spot Bridge (Differential)

Spot Bridge Low Frequency Probes

Spot bridge/differential probes can be referred to as surface probes, but are a lower frequency than their high frequency counterparts. They can be used to find generic subsurface defects. These are normally fitted with a triax detachable connector but can be fitted with a 2-pin microdot or 4-pin Fischer connector.

Add 2M for 2-pin microdot and 4F for 4-pin Fischer.

To view additional table columns, slide right side of table to the left.

O.D. 50-500Hz 100Hz-1KHz 500Hz-2KHz 1-10KHz 5-20KHz 20-50KHz
.300″ ——- ——- SB.3-500H SB.3-1K SB.3-5K SB.3-20K
.350″ ——- SB.35-100H SB.35-500H SB.35-1K SB.35-5K SB.35-20K
.400″ SB.4-50H SB.4-100H SB.4-500H SB.4-1K SB.4-5K SB.4-20K
.500″ SB.5-50H SB.5-100H SB.5-500H SB.5-1K SB.5-5K SB.5-20K
.600″ SB.6-50H SB.6-100H SB.6-500H SB.6-1K SB.6-5K SB.6-20K
.700″ SB.7-50H SB.7-100H SB.7-500H SB.7-1K SB.7-5K SB.7-20K
.800″ SB.8-50H SB.8-100H SB.8-500H SB.8-1K SB.8-5K ——-
.900″ SB.9-50H SB.9-100H SB.9-500H SB.9-1K ——- ——-
1.00″ SB1.0-50H SB1.0-100H SB1.0-500H SB1.0-1K ——- ——-
1.20″ SB1.2-50H SB1.2-100H SB1.2-500H ——- ——- ——-

Ring Bridge (Differential)

Ring Bridge Low Frequency Probes

Ring bridge/differential probes have the same characteristics as their spot probe counterparts but are useful for inspections around fasteners. They are also fitted with a triax detachable connector but can be fitted with a 2-pin microdot or 4 pin-Fischer connector or other connectors on request.

Add 2M for 2-pin microdot and 4F for 4-pin Fischer.

To view additional table columns, slide right side of table to the left.

I.D. O.D. 50-500Hz 100Hz-1KHz 500Hz-2KHz 1-10KHz 5-20KHz
.250″ .600″ ——- ——- RB.6-500H RB.6-1K RB.6-5K
.300″ .650″ ——- RB.65-100H RB.65-500H RB.65-1K RB.65-5K
.350″ .700″ RB.7-50H RB.7-100H RB.7-500H RB.7-1K RB.7-5K
.400″ .750″ RB.75-50H RB.75-100H RB.75-500H RB.75-1K RB.75-5K
.450″ .800″ RB.8-50H RB.8-100H RB.8-500H RB.8-1K RB.8-5K
.500″ .850″ RB.85-50H RB.85-100H RB.85-500H RB.85-1K RB.85-5K
.550″ .900″ RB.9-50H RB.9-100H RB.9-500H RB.9-1K RB.9-5K
.600″ 1.0″ RB1.0-50H RB1.0-100H RB1.0-500H RB1.0-1K ——-
.650″ 1.1″ RB1.1-50H RB1.1-100H RB1.1-500H ——- ——-
.700″ 1.2″ RB1.2-50H RB1.2-100H ——- ——- ——-

Spot Reflection (Driver/Pickup)

Spot Reflection Low Frequency Probes

Spot reflection probes, unlike the bridge/differential type, have a broader frequency band, greater depth penetration, and less noise. They come standard with a triax detachable connector but can be supplied with a 2-pin microdot, 4-pin Fischer, or 4-pin Lemo connectors.

Add 2M for 2-pin microdot and 4F for 4-pin Fischer.

To view additional table columns, slide right side of table to the left.

O.D. 50-500Hz 100Hz-1KHz 500Hz-2KHz 1-10KHz 5-20KHz 20-50KHz
.300″ ——- ——- SDP.3-500H SDP.3-1K SDP.3-5K SDP.3-20K
.350″ ——- SDP.35-100H SDP.35-500H SDP.35-1K SDP.35-5K SDP.35-20K
.400″ SDP.4-50H SDP.4-100H SDP.4-500H SDP.4-1K SDP.4-5K SDP.4-20K
.500″ SDP.5-50H SDP.5-100H SDP.5-500H SDP.5-1K SDP.5-5K SDP.5-20K
.600″ SDP.6-50H SDP.6-100H SDP.6-500H SDP.6-1K SDP.6-5K SDP.6-20K
.700″ SDP.7-50H SDP.7-100H SDP.7-500H SDP.7-1K SDP.7-5K SDP.7-20K
.800″ SDP.8-50H SDP.8-100H SDP.8-500H SDP.8-1K SDP.8-5K ——-
.900″ SDP.9-50H SDP.9-100H SDP.9-500H SDP.9-1K ——- ——-
1.00″ SDP1.0-50H SDP1.0-100H SDP1.0-500H SDP1.0-1K ——- ——-
1.20″ SDP1.2-50H SDP1.2-100H SDP1.2-500H ——- ——- ——-

Ring Reflection (Driver/Pickup)

Ring Reflection Low Frequency Probes

Ring reflection probes have a broader frequency band, greater depth penetration, and less noise. They also can be used around large fasteners for deep layer crack detection. They are equipped with a triax detachable connector, but can also be supplied with a 2-pin microdot, 4-pin Fischer, or 4-pin Lemo on request.

Add 2M for 2-pin microdot and 4F for 4-pin Fischer.

To view additional table columns, slide right side of table to the left.

I.D. O.D. 50-500Hz 100Hz-1KHz 500Hz-2KHz 1-10KHz 5-20KHz
.250″ .600″ ——- ——- RDP.6-500H RDP.6-1K RDP.6-5K
.300″ .650″ ——- RDP.65-100H RDP.65-500H RDP.65-1K RDP.65-5K
.350″ .700″ RDP.7-50H RDP.7-100H RDP.7-500H RDP.7-1K RDP.7-5K
.400″ .750″ RDP.75-50H RDP.75-100H RDP.75-500H RDP.75-1K RDP.75-5K
.450″ .800″ RDP.8-50H RDP.8-100H RDP.8-500H RDP.8-1K RDP.8-5K
.500″ .850″ RDP.85-50H RDP.85-100H RDP.85-500H RDP.85-1K RDP.85-5K
.550″ .900″ RDP.9-50H RDP.9-100H RDP.9-500H RDP.9-1K RDP.9-5K
.600″ 1.0″ RDP1.0-50H RDP1.0-100H RDP1.0-500H RDP1.0-1K ——-
.650″ 1.1″ RDP1.1-50H RDP1.1-100H RDP1.1-500H ——- ——-
.700″ 1.2″ RDP1.2-50H RDP1.2-100H ——- ——- ——-

Sliding Probes

Sliding probes operate in reflection mode and are useful for inspecting rows of fasteners for surface and near-surface cracks.

Adjustable

Fitted with dual microdot connectors

Sliding Adjustable Low Frequency Probes

Frequency Thumbscrew Adjustment Manual Spacers
50Hz-1KHz ASLD-50H-A ASLD-50H
100Hz-20KHz ASLD-100H-A ASLD-100H
500Hz-50KHz ASLD-500H-A ASLD-500H
1KHz-100KHz ASLD-1K-A ASLD-1K
10KHz-500KHz ASLD-10K-A ASLD-10K

Fixed

Fitted with triax, 2-pin, or 4-pin connectors.

Sliding Fixed Low Frequency Probes

Frequency 2-Pin Microdot Triax 4-Pin Fischer
50Hz-1KHz SLD-50H-2M SLD-50H-T SLD-50H-4F
100Hz-20KHz SLD-100H-2M SLD-100H-T SLD-100H-4F
500Hz-50KHz SLD-500H-2M SLD-500H-T SLD-500H-4F
1KHz-100KHz SLD-1K-2M SLD-1K-T SLD-1K-4F
10KHz-500KHz SLD-10K-2M SLD-10K-T SLD-10K-4F

Low Frequency Pencil Probes

Low Frequency Pencil Probes

Low Frequency Pencil Probes

Low frequency pencil probes are excellent for areas around fasteners where greater penetration is required.

To view additional table columns, slide right side of table to the left.

Length 1-5KHz Bridge 90° .5″ Drop 2-10KHz Bridge 90° .5″ Drop 5-20KHz Bridge 90° .5″ Drop 2-10KHz Bridge Straight 1-10KHz Reflection 90° .5″ Drop 10-50KHz Reflection 90° .5″ Drop
3.0″ TPN95-3/1K TPN95-3/2K TPN95-3/5K TPN-3/2K TPNR95-3/5K TPNR92-3/20K
4.0″ TPN95-4/1K TPN95-4/2K TPN95-4/5K TPN-4/2K TPNR95-4/5K TPNR92-4/20K
5.0″ TPN95-5/1K TPN95-5/2K TPN95-5/5K TPN-5/2K TPNR95-5/5K TPNR92-5/20K
6.0″ TPN95-6/1K TPN95-6/2K TPN95-6/5K TPN-6/2K TPNR95-6/5K TPNR92-6/20K
7.0″ TPN95-7/1K TPN95-7/2K TPN95-7/5K TPN-7/2K TPNR95-7/5K TPNR92-7/20K
8.0″ TPN95-8/1K TPN95-8/2K TPN95-8/5K TPN-8/2K TPNR95-8/5K TPNR92-8/20K
9.0″ TPN95-9/1K TPN95-9/2K TPN95-9/5K TPN-9/2K TPNR95-9/5K TPNR92-9/20K
10.0″ TPN95-10/1K TPN95-10/2K TPN95-10/5K TPN-10/2K TPNR95-10/5K TPNR92-10/20K