REDS is an engine monitoring system that monitors the status, health and efficiency of an engine, by measuring the torsional vibrations in the engine. The system is intended to recognize functional deviations in a running engine, by measuring its mechanical and thermal health. This is done within one complete revolution of the crankshaft.

The REDS indicators provide detailed information about the performance of the engine as a whole and of its specific parts. When deviations are detected the location and matter are shown on the user-friendly screen. This allows the user to take appropriate action to prevent component failure, engine failure and consequential damages.

Please download the REDS brochure here: REDS brochure.pdf

The working and installation method


REDS is a non invasive measurement instrument. By placing one sensor (optional 2nd sensor to measure the CAM signal) on the flywheel of the crankshaft the system provides information about the performance of the engine. The deviations and problems are presented as a comprehensive list of indicators on an intelligent screen.

Additionally, the system provides continuous, real-time and remote access to the condition and performance of the engine.


Further data provided by REDS

Moving Parts Clearance: Indication of the status of the moving parts of the engine, measured per cylinder over multiple revolutions.

Twist: Indication of the amplitude of twist angle of the crankshaft, expressed in degrees.

Stresses / Pulses: Indication about abnormal stress pulses in the crankshaft twist, measured in each operating cycle.

External components Indication of the status of the pump, camshaft or other external components not directly connected to the crankshaft, measured over multiple revolutions.

Ship name and engine location

Ship name and engine location of the monitored engine.


Date and time in UTC of last measurement.


The engine’s rotations per minute (rpm) and the engine status.

Mechanical health

Mechanical Health gives an overall indication of the mechanical wear of the engine, such as too high clearances in moving parts (e.g. cylinders, pistons and bearing) that need repair. This indicator is related to damages, not to the combustion process.

Thermal health

Thermal Health indicates if the power contributions of all cylinders are equal and to what extent. Therefore it is an indicator of how efficiently the engine is running. The Thermal Health is used to make adjustments to the combustion process (injector, pump index, etc.) to make the engine run more efficiently.

Spider chart

Gives a direct overview of the engine balance. The engine’s cylinders are placed in a circle ordered by the moment of firing. When the engine operates in a balanced state all cylinders produce the same amount of power. This results in a symmetric spider chart. When deviations and engine imbalance are detected the spider chart becomes asymmetric, thereby clearly showing which cylinders contribute less power and what might be the cause.

Line chart

Shows the engine’s mechanical, thermal health and rpm over a period of time.