SD-200EL electric propeller shaft revolution receiver is a professional marine speed indicator complying with JIS F 8521 standard, specially designed to display propeller rotation speed and rotation direction (AHEAD / ASTERN) for vessel main engines.This gauge features a large circular dial with clear black scale for ahead rotation and red scale for astern rotation, measuring rotation speed from 0 to 120 revolutions per minute. It operates on DC 10V power supply with only 1mA working current, which is energy-saving and stable for long-term marine operation.The whole instrument adopts cast aluminum anti-corrosion housing with fully sealed structure, resisting seawater salt fog, high humidity and vibration in engine rooms. It is widely installed in ship wheelhouses, local engine control stations to provide real-time propeller speed feedback for captain and engineers.
