PRODUCTS
Small Sample Adapter (APM)
+ infoDynamic viscosity measurement for laboratory and industrial applications
Dynamic viscosity measurement is essential for evaluating how liquids and semi-solid materials resist flow under applied force. Accurate viscosity data supports product development, quality control and process optimisation across a wide range of industries.
Fungilab provides complete dynamic viscosity measurement solutions based on precision rotational viscometers, temperature control systems and specialized accessories designed to deliver reliable, repeatable and traceable laboratory results.
Whether measuring low-viscosity liquids or highly viscous materials, Fungilab offers instruments adapted to routine laboratory testing as well as demanding research applications.
Our products
Viscolead Series
Viscolead ONE
Viscolead ADV
Accessories
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.
Precision viscosity measurements using minimal sample volumes
The Small Sample Adapter (APM) extends the capabilities of Fungilab rotational viscometers by allowing accurate viscosity measurements to be performed with reduced sample quantities. This makes it particularly valuable during research, formulation development and quality control when only limited amounts of material are available.
The APM uses a concentric cylinder measuring system that provides controlled shear conditions and highly repeatable viscosity measurements across a broad range of low to medium viscosity fluids.
How the Small Sample Adapter works
The adapter consists of a precision sample chamber and matching spindle designed to minimise the required sample volume while maintaining excellent measurement accuracy. Its geometry improves sensitivity and reduces measurement variability compared with standard spindle configurations.
Typical applications
- Pharmaceutical formulations.
- Cosmetic products.
- Biotechnology samples.
- Chemical formulations.
- Research and development.
- Prototype products.
- High-value laboratory samples.
Compatible Fungilab viscometers
The Small Sample Adapter is compatible with several Fungilab rotational viscometers, including the Viscolead Series and the V-Series, enabling laboratories to obtain accurate results while reducing sample consumption.
Complementary accessories
Fungilab also offers additional accessories for specialised viscosity measurements:
- Low Viscosity Adapter (LCP) for low-viscosity liquids.
- HELDAL Unit for highly viscous and paste-like materials.
- Thermosphere for viscosity measurements at elevated temperatures.
Temperature-controlled measurements
For optimum accuracy, the Small Sample Adapter can be used together with Fungilab heating circulators and refrigerated circulators, ensuring stable thermal conditions throughout the test.
Instrument verification
Routine verification using certified viscosity standard oils helps maintain accurate, repeatable and traceable viscosity measurements while supporting laboratory quality management procedures.
Main advantages
- Requires only a small sample volume.
- High measurement accuracy and repeatability.
- Ideal for expensive or limited samples.
- Concentric cylinder measuring geometry.
- Compatible with professional Fungilab rotational viscometers.
- Suitable for quality control and research laboratories.
Frequently asked questions about the Viscolead ADV
What is the Small Sample Adapter (APM)?
The Small Sample Adapter is a precision accessory for Fungilab rotational viscometers that enables accurate viscosity measurements using very small sample volumes.
Why use a Small Sample Adapter?
It allows laboratories to perform reliable viscosity measurements while minimising sample consumption, making it ideal for valuable or limited materials.
Which applications benefit from the APM?
The adapter is commonly used for pharmaceutical, cosmetic, chemical, biotechnology and research applications where sample availability is limited.
Which Fungilab viscometers are compatible with the Small Sample Adapter?
The APM is compatible with several Fungilab rotational viscometers, including the Viscolead Series and V-Series.
How much sample is required?
The Small Sample Adapter significantly reduces the sample volume required compared with conventional spindle measurement systems.
Is temperature control recommended?
Yes. Using heating or refrigerated circulators helps maintain stable temperature conditions and improves measurement accuracy.
How can measurement accuracy be verified?
Routine verification using certified viscosity standard oils helps ensure accurate, repeatable and traceable viscosity measurements.
What are the main advantages of the Small Sample Adapter?
The APM offers reduced sample consumption, excellent repeatability, high measurement sensitivity and reliable viscosity analysis for valuable laboratory samples.
