This series are more suitable for accurate measurements on long distance fields using 2 or 3 wavelengths.
There are OFIX 1.0 and 2.0 models, but 1.0 was upgraded to 2.0 and removed from production.
This series are more suitable for quick measurements on short distance fields.
There are MINION and MINION-X models.
MINION-X model is for monitoring using Ethernet interface.
This series are more suitable for remote monitoring of fiber line in real time. When the fiber is cut, disconnected or broken, the distance to the break point is instantly detected, located and reported.