Overview

TFB - Attached

The magnetic flux leakage probes offer a superior high-saturation optimized magnetic design. Changeable wear rings improve wear resistance. These probes are ideal for air-cooler tubing inspection (with aluminum fins) and for circumferential crack detection.

Features

Superior high-saturation optimized magnetic design.
Improved wear resistance and changeable wear rings.
Can detect outside volumetric defects.
Suitable for air-finned coolers.

Faster is better - Available for shortest delivery times

The probes listed below are regularly stocked for quick delivery. If the probe you require is not indicated, consult the "Alternate probe diameter" column in the Tube Inspection Probe Catalog to find an alternate probe diameter.

Part ID	Item Number	Diameter
Part ID	Item Number	mm	in.
TFB-120-N20	U8280231	12	0.472
TFB-132-N20	U8280135	13.2	0.520
TFB-170-N20	U8280137	17	0.669
TFB-179-N20	U8280111	17.9	0.705
TFB-187-N20	U8280246	18.7	0.736
TFB-198-N20	U8280361	19.8	0.780
TFB-242-N20	U8280099	24.2	0.953

Standard/Custom Probes (Made to Order)

Use the nomenclature and the chart below to configure your part number.

Probe Type	Probe Diameter (use mm in part ID)			Cable Length
Probe Type	Part Number Diameter	mm**	in.**	Cable Length
TFB: Magnetic flux leakage probe	120*	12.0	0.472	20 m (65 ft) 30 m (100 ft)
	132*	13.2	0.520
	161*	16.1	0.634
	170*	17.0	0.669
	179	17.9	0.705
	187	18.7	0.736
	198	19.8	0.780
	229	22.9	0.902
	242	24.2	0.953
	283	28.3	1.114
	296	29.6	1.165

* Smaller-diameter probes have less sentitivity to external defects, because the probe core section is much smaller than the tube section. However, the sensitivity to internal defects is still very high.

** These probes have an overall diameter that is slightly larger than the part number reference.

MFL Probe Selection Based on Tube Size

High-Saturation MFL Probe (TFB Model) Selection Guide for Common Carbon Steel Tube Sizes

Warning: If your tubes are dirty, a smaller probe might be required for the inspection. Olympus is not responsible if you select a probe that is not compatible with your application. If you require assistance, please contact an Olympus representative.

Example: For a one-inch tube with a wall thickness of 2.41 mm, the required probe would be TFB-187-N20. This probe has an overall diameter of 19.4 mm and changeable hardened steel half-rings.

			Probe ID Diameter - mm (in.)
Tube Dimensions			12.0 (0.472)	13.2 (0.520)	16.1 (0.634)	17.0 (0.669)	17.9 (0.705)	18.7 (0.736)	19.8 (0.780)	22.9 (0.902)	24.2 (0.953)	28.3 (1.114)	29.6 (1.165)
OD mm (in.)	BWG	WT mm (in.)	Overall Diameter (including wear system) - mm (in.)
OD mm (in.)	BWG	WT mm (in.)	12.5 to 12.8 (0.49 to 0.50)	13.7 to 14.0 (0.54 to 0.55)	16.6 to 16.9 (0.65 to 0.66)	18 (0.71)	18.7 (0.73)	19.4 (0.77)	20.5 (0.81)	23.8 (0.94)	25.1 (0.99)	29.2 (1.15)	30.5 (1.20)
19 (0.75)	16	1.65 (0.065)		●
	14	2.11 (0.083)		●
	13	2.41 (0.095)	●	●
	12	2.77 (0.109)	●
25.4 (1.0)	16	1.65 (0.065)							●
	15	1.83 (0.072)							●
	14	2.11 (0.083)						●
	13	2.41 (0.095)					●	●
	12	2.77 (0.109)					●
	11	3.05 (0.12)				●
	10	3.40 (0.134)			●	●
	9	3.76 (0.148)			●
31.75 (1.25)	13	2.41 (0.095)									●
	12	2.77 (0.109)									●
	11	3.05 (0.12)								●
	10	3.40 (0.134)								●
38.1 (1.5)	12	2.77 (0.109)											●
	11	3.05 (0.12)											●
	10	3.40 (0.134)										●
	9	3.76 (0.148)										●
Wear System			Carbide beads (fixed)			Hardened steel half-rings (changeable)

● This is the recommended probe size.

● This size can be used if you do not have the recommended size.

Magnetic Flux Leakage Probes

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