The measurement of water removal during a hot oil transformer dry-out is essential to evaluate the effectiveness and progress of the process. The LNT830 is a stand-alone device that causes moisture in the vacuum line to be trapped and accumulated for measurement. The unit can be installed anywhere between the transformer and the vacuum processing system. The secondary benefit in removing the moisture from the vacuum line is that it allows lower vacuum levels to be achieved and it keeps the vacuum pump oil dry.

The LNT830 has no moving parts so it is a completely reliable system for trapping water vapor. Cool down of the chamber is instantaneous when liquid nitrogen is added. There is no waiting for the temperature to drop as with refrigeration operated cold traps. A vacuum tight sight glass tells the operator when ice has formed and the unit requires thawing. A built-in bypass allows uninterrupted operation and servicing.