Fenske Viscometer measures the viscosity of transparent fluids like oils.
Fenske Viscometer measures the viscosity of transparent fluids like oils.
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Fenske Viscometer
The Fenske Viscometer is a type of glass tube widely used for measuring the viscosity of fluids.
Concept of Viscosity
Viscosity refers to a fluid’s resistance to flow. A low-viscosity fluid flows easily (e.g., water), while a high-viscosity fluid resists flow (e.g., honey at room temperature or bitumen at 80–90°C). Understanding viscosity also requires familiarity with Newtonian and non-Newtonian fluids.
Newtonian vs. Non-Newtonian Fluids
Newtonian fluids: Viscosity remains constant regardless of temperature (e.g., water).
Non-Newtonian fluids: Viscosity changes with temperature. For example, bitumen behaves almost solid at 25°C but becomes less viscous than water at 135°C.
Glass viscometers are designed to calculate viscosity under controlled conditions easily. Among them, the Fenske Viscometer is particularly popular for measuring the viscosity of transparent fluids, such as oils.
Typical Applications:
Measuring kinematic viscosity of oils and lubricants
Standard testing at 40°C and 100°C
Selection of viscometer size based on fluid viscosity and type of oil
The Fenske Viscometer is a reliable tool for laboratories and quality control centers to determine fluid behavior under specified temperature conditions.
Main Applications of the Fenske Viscometer
Measurement of viscosity for various oils and lubricants
Testing transparent fluids up to approximately 100,000 mm²/s (cSt)
Determination of fluid flow behavior at reference temperatures of 40°C and 100°C
Quality control tests in oil, refinery, automotive, and chemical industries
Use in standard laboratories, R&D units, and calibration centers
Features and Advantages of the Fenske Viscometer
Full compliance with national and international standards
Comes with a calibration certificate
Affordable and cost-effective
High-quality construction with consistent tube uniformity
Made of heat- and shock-resistant borosilicate glass
Suitable for low to very high viscosity fluids
Fast delivery even for small quantities
Safe and standard packaging to prevent breakage
Testing Method and Operation
The Fenske Viscometer is a precise reference tool for measuring the viscosity of transparent fluids. Manufactured according to international and national standards, it is widely used in oil, lubricant, petrochemical, chemical industries, and quality control laboratories.
Procedure:
Set the viscosity bath to the desired temperature (40°C or 100°C).
Fill the viscometer tube with a specified volume of the fluid.
Place the tube in the bath to achieve thermal equilibrium.
Allow the fluid to flow through the capillary under equilibrium conditions.
Start a stopwatch as the fluid reaches the first mark and record the time to reach the second mark.
Multiply the measured time by the tube constant (from the calibration certificate) to calculate the kinematic viscosity:
ν=C×t\nu = C \times t
Where:
ν\nu = kinematic viscosity (mm²/s)
CC = tube constant
tt = flow time (seconds)
This method is highly accurate and repeatable, making it recommended in international standards.
Guide to Selecting the Correct Tube Number
Sample viscosity range
Type of fluid (oil, solvent, additive, etc.)
Test temperature (40°C or 100°C)
Required laboratory accuracy
Advantages of Purchasing from Our Collection
Standard Fenske viscometer with valid calibration certificate
Guaranteed quality at competitive prices
Fast supply and full stock of different tube numbers
Expert support for selecting the correct tube
Suitable for quality control, industrial, standard, and educational laboratories
labs, and research centers.
| Weight | 0,01 kg |
|---|---|
| Dimensions | 22 × 5 × 3 cm |
| Measurement Accuracy | According to standard |
| Available Tube Numbers | No. 25, No. 50, No. 75, No. 100, No. 150, No. 200, No. 300, No. 350, No. 400, No. 450 |
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