Surveyor's gear
Category: Gear
Price: 15 gp
Weight: 5 lb
Description: With this plumb line, measuring chain with pins, and slate for recording notes, you gain a +2 bonus to Perception checks to search for secret doors or hidden rooms, but using the gear takes at least 5 minutes.
Published in Mordenkainen's Magnificent Emporium, page(s) 124, Into the Unknown: The Dungeon Survival Handbook, page(s) 114.