The enhanced SFA-2590 has evolved in several positive significant ways. Compared to the original, the enhanced model:
- Is 50% lighter making it easier to carry and handle.
- Will accept a Teflon (GF-2590T), Quartz Silica (GF-2590Q) or Borosilicate Micro-Fiber (GF-2590) filter.
- Has a reduced diameter which means less blockage of the stack by about 2 square inches per traverse point.
- Uses fewer parts, which means a lower price
- Requires a MPT-6-320 pitot tube