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Oil Quality Management: On-Site Condition Monitoring of Fuel, Lube, and Hydraulic Oil

For 25 years, Martechnic has designed and developed oil test and analysis equipment to support the smooth running, optimal and reliable performance, and cost-effective maintenance of on-board machinery.




Martechnic specialises in oil quality management and provides engineers and users with on-site analysis equipment for condition monitoring of lubricant and hydraulic oil, such as marine distillate and marine residual fuels.

Crucial oil parameters can get measured either regularly with the help of portable oil test devices and test kits or on a continuous basis employing permanently installed advanced sensor technology.

Lube Oil Condition Monitoring: Test Kit LUBE OIL CHECK 5
Test Device TWIN CHECK 4.0: Digital Water in Oil and BN Test
Test Device TOTAL IRON CHECK: Digital Test for Chemical Determination of Total Iron Content in Cylinder Drain Oil (CDO), Patent Number: 2982974
MT Sample Retention System: Representative Samples of Fuel, Lube and Hydraulic Oil
Fuel Oil Sampling Equipment with a Tamper-Evident Seal
MT Modular Monitoring System: Lube and Hydraulic Oil Condition Sensors
AHHOI IR - Water In-Line Sensor, Patent No. 2009439
FE Sensor: Ferromagnetic Wear Particles in Lubricating and Hydraulic Oil

The key advantages Martechnic offers its customers include quick and precise information on any occurring changes or abnormal processes in the engine oil condition, effective decision-making on corresponding actions, as well as proper oil system predictive maintenance and the possibility to ensure optimal performance of critical machinery.

Fast and individual response, customer-specific applications and tailor-made solutions, efficient order processing and comprehensive logistic support relate to Martechnic’s principal business lines.

Portable oil test devices and test kits

A variety of portable test devices and test kits is developed and designed by Martechnic to check directly on-site and beyond laboratory practice such essential parameters of lube and hydraulic oil as water-in-oil, alkalinity reserve (BN, TBN), viscosity, density and contamination with insoluble or metal particles.

Regular verification on the basis of trend analysis enables early detection of irregularities in the oil condition. Quick and accurate test results with possibility of immediate assessment help to effectively implement condition-based maintenance programs.

Test cabinets for on-board analysis of fuel and oils

To support vessels with their own on-board oil analysis laboratory, Martechnic supplies a Fuel and Lube Oil Test Cabinet, which contains a selection of portable test devices for easy and fast condition analysis of all principal parameters of fuel, lube and hydraulic oil.

Owing to instant availability of test results, the quality of the delivered bunker fuel and the condition of lubricants and hydraulic oil in use can be regularly monitored and promptly evaluated. This helps to ensure the smooth operation of constituent engine parts as well as provides immediate decisions regarding maintenance, including the possibility of prolonging maintenance intervals.

Sampling equipment for representative oil samples

Accurate results of oil condition analysis imply the availability of representative oil samples. Martechnic offers a full range of sample bottles, cubitainers, drip samplers and sampling kits elaborated for safe collection, retention and transport of representative samples of fuel, lube and hydraulic oil. Sampling bottles differ in size, shape and material depending on the oil to be tested.

All sampling equipment for fuel oil samples is in compliance with MARPOL Annex VI requirements. For collection of primary bunker fuel samples during bunkering, Martechnic supplies manual-valve drip samplers equipped with cubitainers which are attached and reliably protected from tampering and contamination through the special sealing system. Safe storage of retained fuel oil samples is achieved by means of a combination of sampling bottle, proper label made of tear resistant and tamper proof material and individually numbered sealing.

Martechnic’s Sampling Kit is a vacuum hand pump with a flexible tube coupled with an adaptor at a sample bottle. The kit is suitable for sampling collection from different parts of the oil tank, and can be applied to determine free water in the oil tank and possible ongoing friction processes.

Advanced sensor technology for continuous oil condition assessment

Undetected changes in condition of lubricating and hydraulic oil can cause malfunctions in machinery systems. Installation of on-line or in-line sensors provides continuous 24/7 monitoring of essential oil parameters and enables real-time detection and tracking of any occurring changes.

Martechnic has developed a Modular Monitoring System, which encompasses various sensors (viscosity, particle, humidity, FE and water-in-oil sensors) and due to its modular design can be installed in accordance with individual customer-specific application needs.

On-board a vessel, the sensors can be installed for controlling the oil condition in generators, main engines and hydraulic systems. The possibility to set an individual alarm level for each oil parameter under surveillance enables an immediate warning as soon as the critical range is reached, allowing immediate corresponding actions and determination of the root cause of the problem.

All the sensors can be connected with the all-purpose display and data processing unit Datalogger for easy recording, transmitting, displaying, reading and storing of the data.

For continuous monitoring of absolute content of water in lubricants Martechnic has developed the AHHOI – Infrared Water-in Oil Sensor. Installed in the bypass, the sensor measures water molecules present in oil up to 10,000ppm / 1.0% vol. irrespective of the state of water: saturated, emulsified or free. The sensor can be used in a combination with a manifold for monitoring the condition of up to four engines (for example the main engine, hydraulic systems or stern tube seals).

Ultrasonic cleaning equipment

Martechnic offers ultrasonic cleaning tanks, generators, submersible transducers and cleaning liquid for safe, thorough and efficient cleaning of different engine parts (for example, cylinder covers, coolers, valves, lube and fuel oil filters) and in particular difficult-to-reach areas. Alongside standard sizes, customized options can be ordered.

White Papers

  • IMO 2020: VLSFO and On-Board Testing Strategy

    This white paper focuses on the first experiences with new types of VLSFOs and several problematic issues related to fuel oil quality. Martechnic explains why the application of portable, on-board oil analysis equipment can be regarded as a reliable solution in supporting on-board fuel testing strategy, in order to effectively manage new VLSFO batches.

  • Advantages of Regular / Continuous Oil Condition Monitoring

    The paper offers the practical example of trend analysis application with regard to two monitoring methods of water-in-oil concentration: regular (with improved and upgraded portable test device TWIN CHECK 4.0) and continuous (with advanced infrared sensor AHHOI).

  • The Role of Sensor Technology for Condition Monitoring of Environmentally Acceptable Lubricants (EAL)

    Internationally recognised standards on protection of marine environment and the corresponding legislation adopted by the US Environmental Protection Agency (EPA) in 2013 'vessel general permit' (VGP) limit the application of traditional mineral based oils for vessels entering the US waters and establish instead the necessity of use of environmentally acceptable lubricants for machinery parts below the waterline (such as stern tube bearings, thruster gearboxes and horizontal stabilisers).

  • Crucial Oil Quality Check

    Most contamination of lube oil is through water that causes problems and damage in machines and engines.


  • Martechnic Corporate Video

    The corporate video gives an insight into Martechnic’s everyday business life and explains the advantages of the adoption of oil condition monitoring practices or in-service oil testing.

  • Product Video Manual MT CAT FINES CHECK

    The test device MT CAT FINES CHECK allows for easy, quick, and accurate on-board determination of cat fines concentrations in heavy fuel oil (VLSFO and HSFO).

  • Product Video Manual TOTAL IRON CHECK

    The test device TOTAL IRON CHECK is designed for onboard Cylinder Drain Oil (CDO) analysis to regularly monitor the degree of total iron concentration in cylinder drain oil (CDO).

  • Product Video Manual TWIN CHECK 4.0- BN Test

    The test device TWIN CHECK 4⋅0 is developed for regular on-board measurement of two crucial oil parameters: water-in-oil and base number (BN). This video manual shows the detailed procedure for measuring the base number (BN).

  • Product Video Manual TWIN CHECK 4.0- Water in Oil Test

    The test device TWIN CHECK 4⋅0 is developed for regular on-board measurement of two crucial oil parameters:  water-in-oil and base number (BN). This video manual shows the detailed procedure for measuring the water in oil content.

  • SMM 2022: Martechnic 25 Years

    At the SMM 2022, Martechnic celebrated its 25th corporate anniversary, with many international guests and long-term business partners.

Press Releases

Products & services


    To provide a continuous and comprehensive assessment of the quality of lubricating and hydraulic oil, Martechnic® has designed and developed the MT Modular Monitoring System: an assembly of various sensors that measure different oil parameters in real-time.


    Upon delivery the quality of bunker fuel has to be assessed taking into consideration its density, stability and compatibility parameters.

  • TOTAL IRON CHECK (patent number: 2982974)

    Iron concentration in cylinder drain oil is an important parameter to measure regularly in terms of the determination of engine wear condition, and in particular wear rate of cylinder components.


    Catalyst fines (hard particles of abrasive nature consisting of aluminium and silicon oxide) often remain in bunker fuel after the catalytic cracking process of crude oil and are extremely harmful to engine parts.

  • TWIN CHECK 4.0: Digital Water in Oil/BN Test

    The test device TWIN CHECK 4.0 has been developed and designed by Martechnic® in the framework of the digitalisation concept to provide customers with a cost-effective technical solution for regular on-site measurements of two critical oil parameters.


    By installing the VISCOSITY & DENSITY SENSOR, maintenance costs can be decreased and oil change intervals could be extended.

  • MT COOLANT CHECK (patent pending)

    Until now, engine coolant testing was conducted with the help of portable test kits, which all use chemicals, predominantly classified as hazardous products for the environment.


    Regular measurement of multiple oil parameters with on-board testing equipment provide engineers and users with accurate and in-depth information on the oil condition.

Martechnic GmbH
Adlerhorst 4
Hamburg D-22459

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