Hughton will hand Campbell his Toon debut tonight at Chelsea.
He said: "Now he is up to speed. He is a confident player and never doubts his ability. He can certainly go on longer than just this season. He is fortunate not to have suffered any serious injuries. You look at players like David Weir, playing to their 40s and realise that Sol can go on.
"I didn't need persuading to sign him. When someone who has played 12 games at Arsenal becomes available, and you see where they are compared to where we are, he must be doing something right."