Here is a drone designed for inspection in challenging environments. The Skycopter has a tiltable camera that can record 4K video. It has a FPV mode, so you can fly it as if you are on board. This drone has an enclosed design, so can perform inspections safely.
The Skycopter can handle a 360-degreer LED system for dark areas. It uses Skyloc technology for operation in areas where GPS is not available. Skyloc also lets you attach sensors to detect smoke and other sensors. This drone weighs 950 grams. It has flight time of 14 minutes.