Call us on +44 (0) 1983 282834 or reach out via our contact form.

SPMK Systems are undergoing improvements to match our Type Approved Shaft Power Meter System (SPM) and have a longer readiness date, please discuss with sales.

Shaft Power Measurement Kits are available in two formats, the standard and the compact kit. The compact kit is ideal for single day trials, while the standard one is used for long duration trials of between 30-60 days.

Datum Shaft Power Measurement Kits open the opportunity to collect torque, power and RPM data accurately on site. The new Shaft Power Measuring Kits from Datum Electronics provide engineers with the opportunity to measure and monitor shaft power accurately in the field. The kit can be applied using minimal skills in six simple steps and provide accurate data on a portable PC within less than an hour.

Key Features

Key Features


The kits are available in two formats, the standard kit that provides data from the shaft for long duration trials of between 30-60 day and is supplied in a robust weatherproof shaft housing. The second format is a compact version, ideal for single day trials, to access power levels and torque characteristics such as start-up or maximum torque levels.

Both Kits have been designed to be easily fitted with a minimal of on-site operations. The strain gauges used are supplied with the connector to remove the need for soldering and have an encapsulated coating to simplify environmental sealing.

The system provides an output of shaft torque, shaft rpm and shaft power. The instrumentation has an accuracy of 0.1%

Each Kit is supplied with a simple to use PC utility to display and log the data and optional interface is available to provide 4-20mA or +/-10vdc for logging and control systems.

Series 430 Shaft Power Measurement Kits


Standard Kit

  • Shaft Sizes 90mm – 1100mm
  • Battery Life 30-50 days operation
  • Dual Channel Torque/Strain
  • Thrust Option Available
  • Shaft Speed Sensor
  • PC Software

Compact Kit

  • Shaft Sizes 30-500mm
  • Battery Life 30 hours
  • Single or Dual Channel
  • Thrust Option Available
  • Shaft Speed Sensor
  • PC Software

System Advantages

  • Measures Shaft Power, Shaft Torque & Shaft Speed as a basic function
  • Thrust Option is available
  • Easy to install with a step-by-step guide
  • Logs, records and displays ‘real time’ data
  • Portable & lightweight design
  • User-Friendly software
  • Compatible with 2 data channels and shaft speed

The Datum Electronics Series 430 Shaft Power Measurement kits are designed to measure the on-shaft torque for trials and torque testing applications on rotating shafts between 30mm to 1100mm in diameter. They can be used as simple testing of power levels or as a key tool within extended trials to assess fuel efficiency or performance improvements.

The system is designed for measuring power and torque on drive shafts, applications including marine ship shafts, prop shafts and vehicle drive shafts. The trials kit measures the on-shaft torque with the addition of being able to provide a second channel of strain data. This can be torque, plus one other, normally this would be speed in order to give a power measurement information through the shaft. Other useful measurement examples include torque, thrust, bending and load.

Measurement & Analysis

The Datum Electronics Torque Trials Kit does more than just measure Torque; it can be used to verify power outputs from engines and motors.

  • Power Transmission
  • Torque Trials
  • Vibration and Torsional Acceleration
  • Power Transients
  • Peak Torque Levels
  • Power Delivery
  • Shaft Vibration

The main advantage of the Series 430 shaft power and torque trials kit is how easy the instrumentation is to install, set up, test and operate. The trials kit consists of three main component elements making this trials application system as easy and simple and possible.

Permanent Shaft Power Measurement Systems

We also have a commercial ship shaft power meter system, developed to meet the requirements of marine industry customers, is used on vessel propeller shafts to measure ship performance data any time including shaft horsepower, torque, and RPM and compare historical data on an hourly, daily, monthly or annual basis. The system is modular, has a flexible shaft fit and can be installed with a minimal disruption to the ship system.

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.

Reach Out Today

Call us on +44 (0) 1983 282834.

Simply enter your details below and click on the Submit button. Our team will contact you shortly.


JOSCAR registered full colour PNG


<ul class=”product_benefits”>
<li>Measures Shaft Power, Shaft Torque &amp; Shaft Speed as a basic function</li>
<li>Easy to install with a step-by-step guide</li>
<li>Logs, records and displays ‘real time’ data</li>
<li>Portable &amp; lightweight design</li>
<li>User Friendly software</li>
<li>Compatible with 2 data channels and shaft speed</li>





      • How can I verify and prove my fishing vessel’s declared engine power to ensure licence condition compliance?
        This can be achieved using Datum Electronics’ Shaft Power Management Kit (SPMK) – a temporary declared engine power measurement system which installs directly onto the fishing vessel’s propulsion shaft – with the test data logged and stored for use as evidence.  The SPMK system is designed to be easily installed by the end user in under 30 minutes, then quickly removed again after running an engine test to full power and logging the results in kW.  The Datum SPMK system generates test results accepted by the MCA, MSEVT and many other EU fishery agencies for the purposes of fishing vessel licencing.
      • How can I verify and prove my engine power for my EU fishing licence?
        This can be done temporarily using a temporary shaft power measurement system which installs direct to the propulsion shaft and running engine tests to full power.  The data can be logged and stored as evidence.  The Datum Electronics Shaft Power Measurement Kit is the kit of choice by many EU fishery agencies and is simple, easy to install to prove your engine power unobtrusively and without the need of a team of technicians as it has been designed to be installed direct by customer.  The SPMK system can be installed in less than 30 minutes and removed from shaft after your tests are done with a log file for you to keep.
      • How can I confirm the power that my engine is delivering on my boat
        The Datum Electronics SPMK system can be quickly and easily installed onto the propellor shaft taking up minimal space in less than 30 minutes to accuractley measure the power which can be completed by end user with our simple kit

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