#ndt General Electric Co has begun testing autonomous drones and robotic “crawlers” to inspect refineries, factories, railroads and other industrial equipment with an eye on capturing a bigger slice of the $40 billion companies around the globe spend annually on inspections.

In trials with customers, aerial drones and robots are able to move around and inside remote or dangerous facilities while photographing corrosion or taking temperature, vibration or gas readings that can be analyzed by computer algorithm
Source: NDT