Originally Posted by
KRSW
We tried this with a few friendly employees at an airport when I had plenty of time to kill
The my friend's Ritz-Carlton Visa card would set off the metal detectors, whilst the Chase Sapphire Preferred / Reserve did not. The Ritz card was easily 2x the metal of the CSP.
That and the non-contactless AMEX plat are probably what sets it off with my wallet too.