Viscosity is the most important indicator of an oil

It is fundamental to maintaining the integrity of a lube oil film, in preventing metallic contact, scuffing, microwelding and wear of sliding surfaces.

The CMT Viscotube uses a falling ball technique to measure the viscosity of oil in centistokes. The tube is inverted and the time the ball needs to fall down will be manually measured. With the time, ball size and temperature of the oil when measured the viscosity can be calculated. 

The CMT Viscotube comes supplied in a case with multiple balls for increased accuracy, a digital thermometer and a stop watch.

The CMT Viscosity Oil Test Kit gives a simple go / no-go result for viscosity. Typically it will detect 5-10% distillate fuel dilution of an SAE 30 to 40 engine oil as well as increases in viscosity due to oil contamination. It can not be used to get an actual viscosity but you will get an idea whether the viscosity is greater or smaller than the compared oil viscosity. It is essential that both oil measured do have the same temperature.


CMT’s Density and Viscosity Sensor is a breakthrough liquid sensing technology that monitors density, viscosity, specific gravity and temperature in real time. Density and Viscosity are very important to ensure an oil film for optimal lubrication on all parts. Lubrication will keep moving metal parts from producing wear and ensure a long lifetime of your engine. The efficiency of your engine can improve with the right viscosity of the fuel.

The Density and Viscosity Sensor is a newly developed sensor with multiple application areas in marine or industrial areas. The Density and Viscosity Sensor is a newly developed sensor with multiple application areas in marine or industrial areas. Testing the viscosity and density is important for diesel or heavy oil to optimise the efficiency of your engine and minimise wear. The compact sensor enables simple installation within the oil cycle. There are different options for installation within the oil cycle. It can be mounted as a bypass (Nessi compatible), a flange within the pipe or even from the tank with a pipe nipple. Alternatively measurements can be simply inserted in the top. All material in contact with the liquid is stainless steel to make the sensor as reliable as possible. The rugged, patented MesoScale® all metal construction provides unrivalled sensitivity, integrity and dynamic response to changes in liquid composition improving the accuracy of the sensor to 0,0045 g/cc in density and 2% on viscosity. Measurements are being taken in a frequency of 1Hz and can be seen on- or offline on any computer via a standard USB connection (alternatives available). As sealing the Density and Viscosity Sensor uses high quality Viton® (alternatively Kalrez®).Available mounting options are base plates 1/8”, 1/4”, 1/2” and 1” NPT (Nessi) or to screw the sensor in the pipe G1/2”.


CMTs XRF Analysers can measure the concentration of different elements within the oil. We offer one Analyser and one Tester for Sulfur only and a second Analyzer for multiple elements like S, P, Cl, K, Ca, V, Cr, Mn, Fe, Co, Ni, Cu and Zn.

The Analysers and Testers are powered by High Definition X-Ray Fluorescence (HDXRF®) technology: an elemental analysis technique offering significantly enhanced detection performance over traditional XRF technology. This technique applies state-of-the-art monochromating and focusing optics, enabling dramatically higher signal-to-background ratio compared to traditional polychromatic X-Ray Fluorescence. The sample can be measured in a cap or alternatively on the Tester within a bottle containing 25ml of the sample for easier onboard use.
Petroleum laboratories depend on reliable, robust analytical solutions for their fast-paced environment. The devices were designed to meet these needs with an innovative sample introduction system that directs accidental spills to a drip tray and away from valuable components.

The devices comply with ASTM D4294 and ISO 8754 for sulfur analysis of hydrocarbons like crude oil, diesel, gasoline, jet fuel, and lubricants. The Sulfur Analyser and Tester are delivering precise sulfur analysis with limits of detection as low as 2.6 ppm for the Analyser and 50 ppm for the Tester. The Multi Element Analyser delivers sulfur measurements with a limit of detection as low as 5.7 ppm with rapid monitoring of critical elements like Ni, V, and Fe at sub-ppm levels.

With the upcoming limitations of the sulfur content in maritime fuels the Sulfur Analyser and Tester are of specific interest for onboard use.

CMTs Viscosity / Density Meter combines two very important parameters for condition monitoring. The inhouse developed device will guide you through the procedure and give you fast results with a high accuracy.

Testing the viscosity and density is important in every aspect of the marine or industrial areas. The efficiency of every engine depends on the right viscosity of the fuel. 
Viscosity is fundamental to maintaining the integrity of a lube oil film. Lubrication is very important to prevent metallic contact, scuffing, micro welding and wear of sliding surfaces.

  • Measuring the oil viscosity provides an early detection of contamination, fuel ingress and shear thinning.
  • Suitable for all mineral oils or fuels down to 1.5 cSt up to 999 cSt (heated viscometer only).
  • Allows to calculate the combustion performance (CCAI) of fuel or injection / storage temperature.

The right amount of fuel cannot be determined by volume or weight alone. Depending on the injection temperature these values might vary widely and have to be calculated by the density.
Density is required for quantity calculations and also to determine the optimum size of the gravity disc for the centrifuge. Diesel / fuel oil density also gives an indication of other fuel characteristics, including specific energy and ignition quality (CCAI). The density is used to confirm the quantity and grade of fuel delivered.

  • Ensure the correct amount and grade of fuel has been delivered to your ship.
  • Ensure you have been supplied with fuel and not a mixture from fuel and gas (cappuccino effect).

The Viscosity / Density Meter can measure at 25°C, 40°C, 50°C or 60°C and can correct to 40°C or 50°C. It also allows to measure very high viscosities with pinpoint accuracy.
The Viscosity / Density Meter is supplied with a hydrometer. Density is measured at 50°C and directly shown converted to 15°C, giving fast, accurate results. No calculation is needed. 

As with all CMT Devices, the software is easy and intuitive to simplify the procedure as much as possible. All steps are easily explained on the screen and results can be exported for further analysis to a computer.

Testing lubricant samples for ferrous wear debris is an established method to detect developing and impending damages as well as gaining knowledge about the wear life cycle of the tested equipment. CMT´s newest addition to its product range - the Ferrous Wear Debris Meter -  is an accurate, easy-to-use solution for offline and at-line measurements of ferrous wear debris concentrations.

Gain the insight necessary to determine the condition of your equipment. Applicable for diverse applications from testing of used Cylinder Drain Oil of marine 2-stroke engines to monitoring wear of land based manufacturing machinery. The Ferrous Wear Debris Meter provides repeatable and accurate determination of ferromagnetic material concentration down to single ppm levels.

It provides a mass proportional output from any size or quantity of ferrous contaminant particles, even sub-micron particles Particle size does not affect the measurement (in contrast to spectrometric methods). Readings are unaffected by properties (dielectric) of fluid base, or additive package, or water content. Readings are straightforward and are presented in mass/volume standard nits,i.e.; mg Fe per liter, or PPM.

Your benefits:

  • unparalleled quick measurement
  • not restricted to one medium but everything that fits in the sample container can be measured
  • unaffected by particle size giving it an edge over lab methods and therefore excels in wear determination
  • easiest usage imaginable
  • no chemical component

New PREMET M & X launched as successors for the PREMET C, DieselSCOPE and HLV/Baewert indicators!

Further information are available in the category Performance and Efficiency Monitoring.

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