How to tell the difference between TL1, TL2 / TL4 and TL3 XXT Adapter Plates
Answer: Note that the carbide spheres on the top of the plate are in different positions. See illustrations, below:
This is a TL1 adapter plate. Note the side-by-side position of the two carbide spheres at the 12 o'clock position. This plate fits TL1 probe heads.
This is a TL2/TL4 adapter plate. Note the single carbide sphere at the 12 o'clock position. This plate fits TL2/TL4 probe heads.
This is a TL3 adapter plate. Note the space between the two carbide spheres at the 12 o'clock position. This plate fits TL3 probe heads.
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