Using multiple identical sensors is possible, but there are some limitations.
- Kinect for Windows v2 / Kinect for XBox One do not support multiple sensors as their drivers don’t have this ability. This may be caused by the fact that Kinect for Windows v2 does some processing on the graphics card.
- Leap Motion does not support multiple concurrent Leaps. This may be possible at some point as the Leap developers have mentioned this as a potential TODO.
- Kinect for XBox 360, Asus XTion, PrimeSense Carmine and Kinect for Windows v1 support using multiple sensors of the same type.
- You may experience all kinds of issues when using multiple sensors. These may be alleviated by trying different USB ports for each sensor as sometimes different USB ports are connected to a different USB controller on your motherboard. In general, USB bandwidth is going to be a limitation.
If you intend to run multiple sensors together you may be considering doing some kind of tracking where sensors see your body from multiple directions. Note that most Kinects behave in random ways when they fail to see you from the front or back - a sideways bodyshot will confuse the skeleton tracker, forcing it to make all kinds of approximations that probably will insert invalid data in your recording.