Device for the nondestructive testing of especially hot bar shaped rolling material

A device for nondestructively testing hot, bar-shaped rolling stock above the Curie point, and in the course of the rolling process from a rolling stand, the device comprising:

• a test coil system acted on by coolant and having at least two test coils, wherein each test coil is disposed on an end of a longer leg of an L-shaped support capable of swinging around an axis that extends through a zone of intersection of its legs;
• a rotating system-that rotates said test coil system and into which coolant is fed for said test coil system in the plane in which the device is secured to the rolling stand;
• a coolant channel in said rotating system that extends around in a thread-like manner to a front side of said rotating system between the rolling stock and a rotational bearing;
• individual lines that lead from said coolant channel to said test coils in a radial manner;
• and
• a roll cooling system coupled to the rolling stand and said rotating system, wherein the device is disposed downstream of a point where rolling stock exists from said rolling stand.