The VAF T-Sense® Optical Torque Measuring System is a non-contact, high-precision solution for real-time monitoring of torque, shaft speed, and power.
It is available in various configurations, designed for easy installation on propeller or drive shafts ranging from 100 mm to 1000 mm in diameter.
The T-Sense® system provides direct insight into engine and propulsion efficiency, enabling fuel savings of up to 10%. It helps prevent overload, supports performance-based maintenance, and is suitable for continuous operation under harsh maritime and industrial conditions.
Using advanced optical sensor technology and wireless data transfer, the T-Sense® delivers stable, maintenance-free performance with an accuracy better than 0.25% F.S.D. Integrated with systems like PEM4 or IVY®, it becomes a powerful tool for fuel monitoring, performance diagnostics, and voyage reporting.
T-Sense® is also type-approved by major classification societies, underlining its reliability and suitability for modern fleet operations.
Features
- Non-contact optical torque measurement with wireless data transfer (2.4 GHz)
- Real-time monitoring of torque, shaft speed, and power
- High measurement accuracy: less than 0.25% F.S.D. on torque
- Suitable for shaft diameters from 100 mm to 1000 mm
- Maintenance-free operation with no need for recalibration
- Robust design for harsh environments such as engine rooms and heavy industry
- Type-approved by major marine classification societies
- Inductive power supply—no slip rings or brushes required
- Enables fuel savings of up to 10% through efficiency optimization
- Compatible with PEM4, IVY® and third-party systems via Modbus, Ethernet, or 4–20 mA
- Optional extensions for fuel flow measurement, GPS/speedlog input, and SFOC monitoring
- Supports torsional vibration analysis up to 50 Hz
- Optional PEM4 touchscreen display for onboard read-out of key performance data
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Benefits
- Determines ship’s propulsion performance over time.
- Provides insight into engine performance related to consumed fuel.
- Enables optimisation of the efficiency of engine-driven installations to reduce fuel costs.
- Visualisation of engine load margin. Avoiding engine overload.
- Provides insight in engine performance (SFOC) when combined with fuel Flowmeters.
- Direct visual control of the effects of operational changes.
- Torsional vibration analysis for frequencies up to 50 Hz.
Applications
- Real-time monitoring of shaft torque, speed, and power for precise insight into propulsion performance
- Fuel consumption optimization by separating engine and propeller efficiency
- Preventing engine overload through continuous load margin visibility
- Performance diagnostics and benchmarking across vessels or over time
- Integration with monitoring systems (e.g. PEM4 or IVY®) for advanced data analysis and voyage reporting
Short specifications
| Control box for stator part | |
| Power supply | 115 or 230 VAC, 50 or 60 Hz ± 20% |
| Power consumption | 40 VA maximum |
| Input | 2,4 GHz fully protected encrypted signal |
| Output | Ethernet, RS 485 for Modbus or 4-20 mA isolated current output (optional) |
| Dimensions | 408 x 360 x 111 mm |
| Rotor equipment | |
| Material of mounting rings | Carbon steel |
| Material outside cover | Polyurea coated high density foam |
| Material compensator arms | Carbon steel |
| Shaft speed detection | Accelerometer signal |
| Output | 2,4 GHz fully protected encrypted signal |
| Shaft diameter | Min. 100 mm, max. 1000 mm |
| Dimensions | Depending on shaft diameter |
| Operating temperature | -10°C to 60°C |
| Measuring tolerance | < 0,25% F.S.D. on torque |
Did you know
20% FUEL SAVING ALL IN SOLUTION
Learn how our tools and expertise make meeting ShaPoLi regulations easy and efficient. Schedule your demo now to ensure seamless compliance and sustainable operations!
100% compliance SOLUTION
Learn how our tools and expertise make meeting ShaPoLi regulations easy and efficient. Schedule your demo now to ensure seamless compliance and sustainable operations!
Why choose VAF T-Sense Optical Torque Measuring systems?
VAF Instruments is the most preferred supplier of the top 100 shipyards and market leader in maritime measurement systems today because we continuously strive to improve our products and service in order to serve you better.
VAF Instruments offers unmatched reliability with the most comprehensive guarantee in the maritime industry. Combined with a global service network, we provide a unique level of support for our customers—making VAF the trusted partner for torque measurement solutions.
As a leading expert in the design, production, and global distribution of precision measurement and control systems, VAF Instruments serves both the maritime and industrial sectors.
With over 80 years of experience in high-precision measurement technologies, our product portfolio now includes the T-Sense® Optical Torque Measuring System—engineered to deliver real-time propulsion insights, improve fuel efficiency, and reduce operational costs.
Our experts are
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Experience precise and reliable maritime measurements with our advanced sensors. Contact us for innovative solutions that enhance efficiency and sustainability.
Hans Paul | Area Manager
What does the T-Sense® system measure?
T-Sense® continuously measures torque, shaft speed, and power in real-time, providing accurate insights into engine and propulsion performance.
How accurate is the system?
With advanced optical technology, T-Sense® achieves an accuracy better than 0.25% Full Scale Deflection (F.S.D.).
Is T-Sense® maintenance-free?
Yes, the system is completely maintenance-free thanks to its non-contact sensor design and inductive power transmission.
What are the main benefits of using T-Sense®?
T-Sense® helps reduce fuel consumption (up to 10%), prevent engine overload, optimize performance, and support condition-based maintenance.
Can T-Sense® be integrated with other monitoring systems?
Yes, it’s fully compatible with VAF’s PEM4 and IVY® systems, and supports Modbus, Ethernet, and 4–20 mA outputs for integration with third-party platforms.
Why choose VAF T-Sense® over other brands?
T-Sense® combines high accuracy with proven reliability, full marine type approval, and seamless integration with VAF’s performance tools—backed by over 80 years of expertise and a global service network.
