I was a little curious why he bought so much makeup at the mall.
The Thief casts a container's worth of fine powder into the air. The particulates are drawn to any sort of object that is designed to detect people, including tripwires, security cameras, detection lasers, heat sensors, etc. The powder will not trigger these devices or interfere with their operation, but it does reveal their presence to the Thief.
The cloud drifts and swirls, subtly following the Thief for a minute.
Spend an Action, Exert your Mind, and toss a container's worth of fine powder (something industrially produced, not just dust). For the next minute, you are aware of the exact position of all detectors within 50 feet. Sense of direction lasts for 1 minute.