For the duration, you sense any trap within range as soon as it enters your line of sight. A trap, for the purpose of this spell, includes any object or mechanism that was created to cause damage or other danger. Thus, the spell would sense an area affected by the Alarm spell, a glyph of warding, or a mechanical pit trap, but it would not reveal a natural weakness in the floor, an unstable ceiling, or a hidden sinkhole. If you sense traps in this way, they are highlighted by a faint aura for you for the duration.