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Datum Electronics Commercial Marine Shaft Power Meters


Datum Electronics is a world-leading supplier of marine shaft power meters. Our competitively priced, flexible systems are capable of measuring the on-shaft torque and power of a ship on shafts from 150mm to 1,100mm (and above) diameters.

We supply solutions for monitoring ship performance to a range of high-profile clients including the Royal Navy, having installed 15 shaft power meter systems on their Sandown and Hunt class vessels. These needed to meet the most stringent test requirements regarding environmental and electromagnetic radiation due to their application on minehunters. We are constantly working to develop systems to meet the challenges of both the civilian and military sectors.

Datum Electronics solutions can be used to evaluate and improve the efficiency of ships, monitor engine performance, monitor propulsion condition and reduce fuel consumption.

Commercial marine shaft power meter

The Datum Electronics commercial marine shaft power meter has been developed to meet the requirements of marine industry customers by providing continuous power output measurements, as well as aiding fuel economy and equipment maintenance planning.

Robust, permanent, modular and simple to install, the commercial marine shaft power meter accurately monitors the efficiency and performance of the ship’s transmission systems, leading to large savings on running costs.

Monitoring actual power levels provides an accurate reference point in assessing:

  • Propeller condition
  • Hull condition
  • Ship condition changes
  • Engine performance monitoring
  • Propulsion monitoring
  • Operational efficiency planning

This tool will measure on-shaft torque, shaft rotation speed and the power going through the shaft. The stator uses a single-point design and does not require mounting around the shaft, allowing for a fast, simple and less intrusive installation compared with conventional designs.

The company’s power and torque meters have a modular design and can be used on shafts of 150mm-1,100mm diameter, with rotational speeds of up to 900rpm. Standard output is RS485, but this can be upgraded to USB, ModBus, Ethernet, RS232 and analogues (0-10V/4-20mA).

In addition, systems for power and torque measurement can be used with our display panel for either single or dual-shaft applications. Unlike other companies, we can also write algorithms and protocols to suit various customer system needs.

Shaft power measurement kit

Datum Electronics temporary torque and power measuring systems monitor the on-shaft torque for trial applications on rotating shafts of 30mm-1,100mm diameter (and beyond this if required). Whether used for the simple testing of power levels or as a key tool in extended trials to assess fuel efficiency, the series 430 kit is easy to install, test and operate.

The system logs directly on to a PC or laptop with the aid of its software. Other advantages include:

  • Portable and lightweight design
  • User-friendly software
  • Easy to install with a step-by-step guide in less than 30 minutes
  • Measuring shaft power, torque and speed as a basic function
  • Various digital and analog output options
  • Logs, records and displays ‘real time’ data
  • Compatible with two data channels and shaft speed

As well as measuring torque, the instrumentation can be used to verify power outputs from engines and motors, as well as analysing other types of data, including:

  • Power transmission
  • Shaft vibration
  • Torque trials
  • Peak torque levels
  • Power delivery
  • Power transients

Marine shaft power meter system for military vessels

The Datum Electronics marine shaft power meter system assesses and monitors propeller shafts on ships, by measuring shaft speed, power and torque. Originally designed for use by the Royal Navy, later variations have been provided for the Indian Navy, Australian Navy and Korean Navy.

The company’s propeller shaft power meters have been through rigorous UK MOD and USA MIL testing programmes for the harshest of environments, and are therefore verified in a number of marine conditions, including:

  • MIL Spec std. 901-D shock
  • 167-1A 2005 Vibration
  • Safety Case to JSP430
  • Shock to Def Stan 08-120
  • EMC to Def Stan 59-41
  • Selection of marine shaft power meters Def Stan 02-606
  • Magnetic Ranging to 08-123 DS31

Other environmental tests will include Def Stan 08-123 DS28 (shock), D25 (vibration), DS24 (contamination), DS9 (temperature and humidity) and DS21 (salt atmosphere).

The series 420 torsionmeter system can be configured for single-shaft or multiple-shaft use (two, three or four shafts), in order to provide accurate non-contact shaft measurement. A fitted shaft unit measures torsional strain and rotational speed, with a separate stator unit to transmit the data to the control unit.

This system fits shafts of 160mm-1,100mm diameter, with stator housings manufactured for a range of shaft sizes:

  • Size 1: shafts 160mm-250mm
  • Size 2: shafts 250mm-350mm
  • Size 3: shafts 350mm-500mm
  • Size 4: shafts 500mm-650mm
  • Size 5: shafts 640mm-800mm
  • Size 6: shafts 800mm-1,100mm

Installation, training and consultancy

All of our systems are supplied along with the required product information and user handbooks. Full training can be provided, either on-site by one of our installation engineers or at our specialist facility in the UK.

Datum Electronics has expertise in a range of fields including electronics, torsional vibration, field testing, strain gauging and installation. Contact us with your problem and we will endeavour to find a workable solution for you.

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Press Release

Engine Power Verification for Vessels with Shaft Power Measurement System

Datum Electronics' shaft power measurement system allows RDA Shiptech to verify engine capacity of fishing vessels and fleet capacity.

White Papers

How Measuring Shaft Power Can Save Money on Fuel and Maintenance

The Energy Efficiency Design Index (EEDI) and the Ship Energy Efficiency Management Plan (SEEMP) requirements were made legally binding by the MARPOL Annex VI, the first climate change treaty to be adopted since the Kyoto Protocol. The technical requirements in this treaty are aimed at promoting the use of more energy efficient (less polluting) equipment and engines.

Datum Electronics Ltd

Global HQ

Castle Street

East Cowes

PO32 6EZ

Isle of Wight

United Kingdom

+44 1983 28 28 34 +44 1983 28 28 35

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Press Release

26 February 2019

Datum Electronics' shaft power measurement system allows RDA Shiptech to verify engine capacity of fishing vessels and fleet capacity.

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23 January 2019

Datum Electronics are extremely proud to announce that our marine shaft power meter system has been awarded a plan approval (PA) by the China Classification Society.

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12 November 2018

Netherlands-based Intertech BV has become a representative of Datum Electronics for torque sensors and shaft power measurement solutions in the Dutch market.

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27 September 2018

Oldendorff Carriers has selected Datum Electronics to provide its Datum Shaft Power Meter systems for seamless integration with a range of existing vessel performance monitoring systems.

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17 September 2018

SMM Hamburg, the biggest maritime fair of 2018, ended recently and Datum Electronics, together with our German sales agency Matau-Marine, joined thousands of maritime professionals and industry visitors in making the event hugely successful.

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12 July 2018

We will be exhibiting the Datum Electronics Shaft Power Meter systems at the SMM International Trade Fair in Hamburg, Germany.

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12 April 2018

In partnership with our Danish distributor, Uhre & Nybaek, we will be exhibiting at the Danish Maritime Fair in Copenhagen, Denmark.

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23 March 2018

Datum Electronics, a global supplier and manufacturer of torque measurement and shaft power technology, announces an enhanced ECR display for their Marine Shaft Power Meter (MSPM) system.

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14 December 2017

Datum Electronics Ltd is pleased to announce the expansion of the company’s presence to include Athens, Greece. 

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5 October 2017

Datum Electronics Ltd is pleased to announce the appointment of Mark Gladdis as our new commercial marine product manager.

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6 September 2017

Datum Electronics will be attending the London International Shipping Week to help ship operators save costs.

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2 June 2017

Headquartered in Livonia, Michigan, Comtel Corporation will provide sales and product support for Datum Electronics torque transducers and shaft power measurement solutions across the following states: Michigan, Indiana, Kentucky, Ohio, West Virginia and Pennsylvania.

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21 April 2017

Malcolm Habens, managing director of Datum Electronics, is speaking about developments in shaft power measurement at the 'Low Cost Monitoring to Optimise Propulsion Efficiency' workshop at the Southampton Marine and Maritime Institute on Wednesday the 25 April 2017.

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7 February 2017

Datum Electronics is proud to participate in a revolutionary project, Monitoring for Operational Vessel Efficiency (MOVE), funded by Innovate UK, which has brought new opportunities for the small commercial vessel market, within the maritime sector.

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1 February 2017

Datum Electronic's client, Marine Scotland, monitors and controls the operations of all fishing vessels in Scottish waters as well as the activities of Scottish vessels wherever they may fish, and their fishing capacity, defined in terms of engine power and tonnage of the actual fishing vessels.

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3 November 2016

The manufacturing industry is constantly growing due to developments in technology. More efficient machinery, more automation equipment and more productive processing lines surround us in every aspect of manufacturing and engineering.

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1 June 2015

Datum Electronics Ltd has been granted a contract to supply Shaft Torsion and Power meters to Griffon Hoverwork for their two new 12000TD hovercraft.

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1 June 2015

The standard range of the Datum FF425 Torque Transducer Series is based on DIN flanges to measure from 0Nm-100Nm up to 0Nm-10,000Nm.

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1 June 2015

The Datum Hawk System, constantly watches the profile of the torsional forces delivered by the engine to its drive shaft.

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20 May 2014

The Datum Electronics commercial marine torsion meter (MTM) now offers even more flexibility and control to customers who need to measure power and/or torque.

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20 May 2014

The Datum Electronics pre-encapsulated strain gauges come supplied with in-line connectors, allowing for a quicker, more efficient installation without the need for soldering.

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20 May 2014

Increasingly we are seeing a need for more accurate torque measurement systems where customers require real-time torque data and can no longer rely on older, less accurate systems, which estimate or calculate from hydraulics or electrical power.

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Regional Offices

Datum Electronics Ltd

Global HQ

Castle Street

East Cowes

PO32 6EZ

Isle of Wight

United Kingdom

+44 1983 28 28 34 +44 1983 28 28 35
Datum Electronics Athens

Posidonos 31




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