LEM 2-1M. Electromagnetic log

The log measures speed through the water of displacementtype and hydrofoil vessels. Three basic log modifications are available, which differ in types of induction receivers and their installation methods.

The construction design of receivers and digital processing of their signals provide generation of speed data by the log when the ship is sailing in slough ice, ice and snow sludge, and water aeration at the receiver location.

Three basic log modifications are available, which differ in types of induction receivers and their installation onboard the ship.

LEM2-1MN:
induction receiver is installed in the gate valve flush with the ship's bottom
LEM2-1MV:
induction receiver is installed in the gate valve with 150 mm projection from the ship's bottom
LEM2-1MK:
induction receiver is fixed on the stationary part of the hydrofoil vessel wing, providing speed measurement both in hullborne and foilborne positions.

Placing the receiver in the gate valve allows the sensors to be replaced, if required, without docking the ship.
Small diameter of sensors provides efficient mechanical protection.

Repeaters of speed and covered distance installed in enclosed service spaces and on the open deck can be supplied in addition to the log. Log LEM2-1M is highly reliable, designed for 25 year operation and provides unlimited operation within complete mean resource life of minimum 60000 hours.

System main advantage is its lasting continuous operation without special maintenance