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Mineral oil viscosity measurement
Accurate mineral oil viscosity measurement solutions
Mineral oil viscosity measurement is an essential quality control procedure used to evaluate the flow characteristics and performance of lubricants, hydraulic fluids, transformer oils and other petroleum-based products.
Reliable viscosity testing ensures that mineral oils meet product specifications, industry standards and operational requirements. Accurate measurements also help monitor product consistency throughout manufacturing and quality control processes.
Fungilab offers complete viscosity measurement solutions for mineral oils, including both kinematic and dynamic viscosity instruments, precision temperature control systems and certified reference materials.
Our accessories
Enhance the capabilities of your Fungilab viscometer with accessories designed for more accurate, versatile and efficient viscosity measurements.
Viscosity Standard Oils
Certified viscosity standards
Fungilab offers a wide variety of certified viscosity standards for the calibration and verification of glass capillary viscometers, auto viscometers, rotational viscometers, flow cups and other viscosity measuring equipment.
Viscosity plays a critical role in the performance in different fields. Using a certified viscosity standard is essential for precise calibration and verification of viscosity measurements, ensuring the accuracy and reliability of analytical instrumentation.
All viscosity standards are traceable to the primary standard of pure water, having a Kinematic Viscosity of 1.0034 mm2/s at 20 °C, as adopted by National Metrology Laboratories such as NIST and national standard bodies like ASTM, IP and ISO. All certification is carried out in accordance with ISO 17025 and ISO 17034 accreditations.
General purpose viscosity standards
Fungilab ISO 17025 / ISO Guide 34 dual certified general purpose viscosity standards are tested in accordance with ASTM D 2162, (“Standard Practice for basic calibration of master viscometers and viscosity standard oils”).
They are fully traceable to national standards and are test equipment compatible.
- Certified according to ISO 17025 / ISO Guide 34 under UKAS accreditation
- Tested in accordance with ASTM D 2162 (“Standard Practice for basic calibration of master viscometers and viscosity standard oils”)
- Density g/mL in accordance with ASTM D 1480
- Kinematic (cSt), Dynamic Viscosity (mPa•s) & Density (g/mL) given at all temperatures
- Standard Pack Size 600mL, available also in 5L, 10L and 20L
- Fully traceable to national standards
- Ensures full compliance to ASTM & IP test method protocol
- Tamper evident security packaging
- Holographically marked to assure authenticity
Flow cup viscosity standards
Fungilab ISO 17025 / ISO Guide 34 dual certified flow cup standards are especially designed for use in DIN, Ford, ISO, Shell and Zahn flow cups and are also dual purpose density standards.
Certified at 20°C and 25°C, each value is tested to ASTM D 2162 for viscosity measurement and ASTM D 1480 for density measurement. Each value at every test temperature is tested to ASTM D 2162 and are NOT extrapolations.
- Certified according to ISO 17025 / ISO Guide 34 under UKAS accreditation
- Tested in accordance with ASTM D 2162 (“Standard Practice for basic calibration of master viscometers and viscosity standard oils”)
- Density g/mL in accordance with ASTM D 1480
- Kinematic (cSt), Dynamic Viscosity (mPa•s) & Density (g/mL) quoted at all temperatures
- Ensures full compliance to ASTM & IP test method protocol
- Full traceability to national standards
- Tamper evident security packaging
- Holographically marked to assure authenticity
General purpose silicone standards
Fungilab ISO 17025 / ISO 17034 dual certified Silicone Rotational Viscosity Standards are specifically formulated for use with rotational viscometers. Supplied in 600 mL ‘ready to use’ packs specially designed to eliminate the requirement to transfer the sample to a test beaker. Silicone viscosity standard fluids are most commonly used to verify calibration of Fungilab lab viscometers.
General purpose silicone fluids are the most commonly used standard for verifying calibration of your Fungilab Viscometer. Silicone Standards are Newtonian fluids which are accurate to ±1% of viscosity value. Silicone fluids provide excellent temperature stability. Fungilab Viscosity Standards are certified by methods traceable to the United States National Institute of Standards and Technology (NIST).
Key benefits
- Certified according to ISO 17025 / ISO 17034 under UKAS accreditation
- 600 mL of product supplied in a ready to use ‘test in pack’ container
- Tested and certified at 20°C and 25°C
- 24 month shelf life
- Ensures full compliance to international test method protocol
- Full traceability to national standards
LABORATORY DIVISION
Dynamic viscosity
Viscosity is part of the science of Rheology which quantifies the resistance materials give to changing shape.
Proper interpretation of viscosity data can reduce the rate of rejects while keeping production and formulation development costs to a minimum. Consistent product quality is ensured through proper viscosity measurements, either alone or in conjunction with compatible tests.
Dynamic viscosity testing can help with:
- Material characterization or “finger-printing”
- Standard testing methods to check for differences between batches
- Indirect way of measuring quality
- Product formulation
- Quality control
- Process control
- Design, optimization and operation of process equipment
Material characterization or “finger-printing”
Standard testing methods to check for differences between batches
Indirect way of measuring quality
Product formulation
Quality control
Process control
Design, optimization and operation of process equipment
Viscosity types
Dynamic viscosity
Centipoise (mPa*s)
Kinematic viscosity
Centistokes (mm2/sec)
Apparent viscosity
Centipoise (mPa*s)
Newton’s Law
According to Newton’s law, the viscosity of a fluid is constant. As shear rate changes, shear stress changes in proportion such that viscosity is constant. Common fluids that exhibit such behavior are:
Unfortunately for us, not all fluids follow Newton’s law. In fact, most fluids do not. For this reason, fluids are classified into two categories:
Rotational Viscometer
The viscosity is calculated from the measured torque and rotational speed, as well as the dimensions of the measuring geometry.
A fluid’s resistance to flow is measured by the torque it exerts on the rotating shaft of the viscometer.
Absolute viscosity: the measuring geometry fulfills certain requirements (which is the case of coaxial spindles).
Relative viscosity: the dimensions of the measuring geometry are not well defined.
Advantage
Flexibility in:
- Viscosity Range
- Temperature range
- Shear rate range
Application
For Newtonian and non-Newtonian substances and temperatures different from room temperature.
Professional viscosity measurement for mineral oils
Mineral oil viscosity measurement plays a critical role in evaluating lubricant performance, equipment protection and product quality. Since viscosity directly influences lubrication efficiency, heat transfer and mechanical wear, precise laboratory measurements are essential throughout production and quality assurance.
Depending on the application and testing standard, mineral oils may be analysed using either kinematic or dynamic viscosity measurement techniques.
Kinematic viscosity measurement
Kinematic viscosity is commonly determined using calibrated glass capillary viscometers operating under precisely controlled temperature conditions. Fungilab supplies complete kinematic viscosity solutions, including:
Dynamic viscosity measurement
For applications requiring dynamic viscosity determination, Fungilab manufactures professional rotational viscometers, including the Viscolead Series and the V-Series.
Importance of temperature control
Viscosity is highly sensitive to temperature, making precise thermal regulation essential for obtaining accurate and repeatable results. Fungilab provides heating circulators and refrigerated circulators for laboratory temperature control across a wide operating range.
Applications
- Lubricating oils.
- Hydraulic oils.
- Transformer oils.
- Industrial mineral oils.
- Petroleum products.
- Quality control laboratories.
- Research and development.
Instrument verification
Routine verification using certified viscosity standard oils allows laboratories to maintain traceable measurements and verify instrument performance in accordance with laboratory quality systems.
Benefits of accurate viscosity measurement
- Reliable product quality control.
- Compliance with laboratory standards.
- Improved production consistency.
- Higher measurement repeatability.
- Long-term instrument traceability.
- Support for lubricant performance evaluation.
Frequently asked questions about Mineral oil viscosity measurement
Why is mineral oil viscosity measurement important?
Viscosity directly affects lubrication performance, equipment protection and product quality, making it one of the most important laboratory tests for mineral oils.
Which viscosity measurement method is commonly used for mineral oils?
Kinematic viscosity measurement using capillary viscometers is widely used, although dynamic viscosity measurements may also be required depending on the application.
Which Fungilab instruments are suitable for mineral oil testing?
Fungilab offers THERMOCAP precision baths, capillary viscometers and professional rotational viscometers for comprehensive mineral oil viscosity analysis.
Why is temperature control necessary?
Since viscosity changes significantly with temperature, precise thermal control is essential for obtaining accurate and repeatable laboratory results.
Which industries perform mineral oil viscosity measurements?
Petroleum, lubricant, automotive, power generation, chemical and industrial laboratories routinely perform mineral oil viscosity testing.
Can rotational viscometers measure mineral oils?
Yes. Rotational viscometers can determine the dynamic viscosity of mineral oils when required by the testing procedure.
How is instrument accuracy verified?
Routine verification using certified viscosity standard oils ensures reliable, repeatable and traceable viscosity measurements.
What are the benefits of accurate viscosity measurement?
Accurate viscosity measurements improve product consistency, support regulatory compliance, optimise quality control and help evaluate lubricant performance.
