Main Menu

See All Software See All Instruments See All Transducers See All Vibration Testing Equipment See All Electroacoustics See All Acoustic End-of-Line Test Systems See All Academy See All Resource Center See All Applications See All Industries See All Services See All Support See All Our Business See All Our History See All Global Presence

Main Menu

See All nCode - Durability and Fatigue Analysis See All ReliaSoft - Reliability Analysis and Management See All Test Data Management See All DAQ Software See All Drivers & API See All Utility See All Vibration Control See All High Precision and Calibration Systems See All DAQ Systems See All S&V Hand-held Devices See All Industrial Electronics See All Power Analyzer See All S&V Signal Conditioner See All Acoustic See All Current and Voltage Sensors See All Displacement See All Force sensors See All Load Cells See All Pressure See All Strain Gauges See All Temperature Sensors See All Torque Sensors See All Vibration See All Accessories for Vibration Testing Equipment See All Vibration Controllers See All Measurement Exciters See All Modal Exciters See All Power Amplifiers See All LDS Shaker Systems See All Test Solutions See All Actuators See All Combustion Engines See All Durability See All eDrive See All Production Testing Sensors See All Transmission & Gearboxes See All Turbo Charger See All Training Courses See All Acoustics See All Asset & Process Monitoring See All Custom Sensors See All Data Acquisition & Analysis See All Durability & Fatigue See All Electric Power Testing See All NVH See All Reliability See All Smart Sensors See All Vibration See All Weighing See All Automotive & Ground Transportation See All Calibration See All Installation, Maintenance & Repair See All Support Brüel & Kjær See All Release Notes See All Compliance See All BKSV Worldwide Contacts

Main Menu

See All API See All Microphone Cartridges See All Microphone Sets See All Microphone Pre-amplifiers See All Sound Sources See All Acoustic Calibrators See All Special Microphones See All Accessories for acoustic transducers See All Experimental testing See All Transducer Manufacturing (OEM) See All Piezoelectric Charge Accelerometers See All Piezoelectric CCLD (IEPE) accelerometers See All Electroacoustics See All Noise Source Identification See All Environmental Noise See All Sound Power and Sound Pressure See All Noise Certification See All Industrial Process Control See All Structural Health Monitoring See All Electrical Devices Testing See All Electrical Systems Testing See All Grid Testing See All High-Voltage Testing See All Vibration Testing with Electrodynamic Shakers See All Structural Dynamics See All Machine Analysis and Diagnostics See All Dynamic Weighing See All Vehicle Electrification See All Calibration Services for Transducers See All Calibration Services for Handheld Instruments See All Calibration Services for Instruments & DAQ See All On-Site Calibration See All Resources See All Software License Management

Wärtsilä: Using Natural Gas as Fuel in Marine Engines

Wärtsilä, Finland


Dual fuel engines operating on natural gas need highly accurate torque measurement – HBK's T40MAR enables Wärtsilä to use natural gas as a fuel.


How a torque transducer enabled Wärtsilä to use natural gas as a fuel

Wärtsilä has developed dual fuel engines that are able to run on either natural gas, marine diesel oil or heavy fuel oil. In order to use the dual fuel engines in marine installations with direct driven propulsion, a precise load signal is required from the engine’s propeller shaft.

HBK’s T40MAR torque transducer was accurate enough to offer the data Wärtsilä needed in shipbuilding.

The dual fuel engines developed by Wärtsilä run on either natural gas (LNG), marine diesel oil (MDO) or heavy fuel oil (HFO).

The engine may be switched from operating in gas mode to oil mode and vice versa while it is running. When the engine runs in gas mode, a precise load signal is needed from the output shaft providing data on how much power the engine produces to be able to control the engine.

To produce a precise load signal, the torque transducer needs to provide highly accurate measurement.

Accuracy is crucial in measuring torque

HBK and Wärtsilä worked together to find a solution to the problem, and the most suitable option was HBK’s T40MAR torque transducer.

Wärtsilä installed the T40MAR to their engine between the engine flexible coupling and the gearbox hub. When the engine operates on gas, the fuel injection system needs the precise load signal for the engine to work correctly.

The T40MAR measures the output shaft’s torque, which creates the load signal. Hence, the torque transducer needs to have a high accuracy level.

While other methods were not accurate enough, T40MAR fulfilled the accuracy requirements with the accuracy class of only 0.15. This provides the best possible operating conditions for the engine to run and move the ship. 

Growing demand for natural gas

Stricter emission legislation requires, ships to minimize sulphur emissions. Natural gas does not produce as much emissions, which makes it a cleaner fuel to use in ship engines.

In addition, natural gas makes expensive exhaust gas cleaning systems redundant, so it is also a more cost-efficient choice. Wärtsilä’s dual fuel engines are compliant with IMO Tier III regulations when the engine uses gas, and they are compliant with IMO Tier II regulations when the engine uses liquid fuel oil.

If you want to operate in compliance with IMO Tier III requirements today, you need to use natural gas or liquid fuels in combination with exhaust gas cleaning.

When operating on natural gas exhaust gas cleaning is not required. As the market for natural gas powered ship engines is growing, it is very important to answer this new demand.


Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. We emphasise innovation in sustainable technology and services to help our customers continuously improve their environmental and economic performance.

Guy Beaho Manager Business Development at HBK
Viktor Häggblom Development Engineer at Wärtsilä Marine Solutions

Technology used

Other case studies