YDK (Yokogawa) EML500 Electromagnetic Speed Log (End of Life)

YDK (Yokogawa)

Please NOTE –  Although the Yokogawa EML500 Speed Log is no longer in production, it continues to be supported and spare parts available until further notice.  Contact Mackay Service for any questions.

The recommended replacement and upgrade for the EML500 is the YDK’s EML900 Electromagnetic Speed Log

Yokogawa’s EML500 is an Electromagnetic Speed Log designed for general merchant vessels; supporting both flush-mountable and dual-axis sensors.


  • Preamp built into the sensor for stable & long-distance transmission (max.300m long) of current signal
  • Single-axis sensor (fore-and-aft)
  • Optional dual-axis sensor measures longitudinal & traverse speed
  • Can receive a backup signal (NMEA-0183) from external speed sensors (i.e. GPS receiver)
  • Sea Valves available for installing sensors on the bottom of the hull


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