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Product Description

VAF Instruments
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Full HD, 4K

The use of a T-Sense® torque measuring system means efficiency improvement, overload protection and prevention of breakdown costs. For example, in shipping industry its application has led in some cases to fuel savings up to 5%. The T-Sense® measuring system is based on optical displacement technology and can be mounted around propeller or drive shafts.
SMEC Automation presents: T-Sense®
The T-Sense® is an intelligently designed optical torque measuring system, which can be mounted around the shaft by the vessel''s crew or shipyard without engineering or commissioning assistance.


With the PEM4 Propulsion Efficiency Monitor, VAF Instruments has developed a completely new monitoring system based on many years of experience and a proven technology, but with modern user friendly electronics. The PEM4 system is able to monitor one or two T-Sense® torque measuring systems together with the fuel consumption of six engines/consumers (max. 12 VAF flowmeters).

The PEM4 Propulsion Efficiency Monitor is very easy to use because of its menu structure. All measured and calculated data can be read directly from the screen, on which they are displayed as both figures and graphs. The PEM4 system helps owners to improve ship efficiency and to monitor engine performance in a very convenient way.

The standard T-Sense® system is based on torque and speed measurement, out of which performed power on the shaft can be calculated. The system can be extended with the following modules:

  • energy consumption
  • actual fuel consumption per engine, per genset or boiler
  • specific fuel consumption per kW (SFOC of main engines)
  • fuel consumption per nautical mile
  • total power calculation
  • propeller thrust measurement

For these extensions other signals can bee fed to the PEM4 system, such as fuel flows, fuel temperature, speedlog, GPS or shaft generator power level. Together with the standard torque, speed and power signals, the PEM4 system will be able to calculate the desired data.


The standard PEM4 Propulsion Efficiency Monitor design can be used in a variety of applications such as:

  • Continuous power output measurements for ship propulsion
  • Continuous power and fuel consumption management
  • Direct visual control of changes in engine setting, trim and draught
  • Continuous monitoring of torque, speed, power or thrust

Besides these standard applications, VAF Instruments also manufactures special designs and variants:

  • Testbed shafts and spacers
  • Tailor-made hardware and software

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SMEC Automation Private Limited


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Kaloor, Ernakulam
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