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Yokogawa Denshikiki Co., Ltd.


Electromagnetic Log


The EML50 is compact and can be mounted in many different ways.



  • Easy to read analog bar graphics and digital indicators accurately read out the ship's speed on the display.
  • An electromagnetic counter displays the distance traveled, and the counter is resettable.
  • A preamplifier is built into the sensor for stable and long-distance transmission (max. 300m long) of the current signal.

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Measurement Range Speed -5 to 25 kt
-8 to 40 kt
-13 to 65 kt
Distance 0 to 9999.99 nm


Speed ±0.3 kt or 2% of reading whichever larger
Distance ±0.1 nm/h or ±2% whichever larger
Power Supply 24 V DC +30% to -10% (Approx. 3A)
Signal Outputs Speed Current: 0 to 20mA 2 circuits
Distance (Pulse) 200 P/nm photo-coupler output, 5.5V, 5mA 4 circuits
100 P/nm open collector (For distance indicator) 2 circuits
Digital signal NMEA-0183 2 circuits
Environmental Ambient

0 to +50 deg.C (Operating)
-20 to 60 deg.C (Not operating)

Humidity 10 to 95%rh
Water-pressure Max. 0.5 MPa (At bottom valve and sensor)

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