Detect Technology

For the duration, you sense any mechanical device within 30 feet of you. If you sense technology in this way, you can use your action to see a faint aura around any visible creature or object in the area that bears technology, and you learn its type, if any.

Types of technology include; steam pressure, electrical lines, clockwork gears, and CBRP (chains, belts, ropes, and pulleys).

The spell can penetrate most barriers, but it is blocked by 2 feet of stone, 3 inches of common metal, a thin sheet of lead, or 6 feet of wood or dirt.