Encircling Coils (OD coils) are typically used for on-line inspection of tubes, bars and wires.
These specialty coils are typically used for detecting manufacturing-related flaws such as inclusions, porosity, cracks, laps, seams, etc. Encircling coils are also used when testing for correct heat treatment.
Also available:
U90 series coils for diameters from 45mm to 90mm.
U20 series coils for diameters from 0.5mm to 20mm.
Contact us for a quote or more info on other sizes.