Digital Viscometer

Digital Viscometer

Digital Viscometer

The viscometer refers to an instrument used to measure the viscosity of fluids (liquid and gas). NDJ and DV series digital viscometer has the advantages of high measurement accuracy, stable viscosity readings, convenient operation, and good anti-interference performance. They are widely used to determine the viscosity of various fluids such as grease, paint, food, medicine, adhesives, and cosmetics. It can also be used to measure the viscous resistance of liquids and the absolute viscosity of liquids.

NDJ Viscometer Operation
Digital Viscometer

Features of Digital Viscometer

1. Stable speed.
2. It can be used as a stand-alone computer, or it can be connected to a micro printer and a computer to realize data collection.
3. The speed, rotor number, viscosity, torque, and temperature can be displayed simultaneously.
4. Different standard spindles can be selected according to needs.

Types of Drawell Viscometers:

Low Viscosity Viscometer:

Medium & High Viscosity Viscometer:

High-Temperature Digital Viscometer:

How to Choose a Digital Viscometer

1

Start with the Expected Viscosity Range

Choose a model whose measurement range covers the expected viscosity of your sample. Do not select a model only by its maximum viscosity value; spindle and rotational speed also affect the available measurement range.
Low viscosity → NDJ / LVDV
Medium viscosity → RVDV
High viscosity → HBDV

2

Confirm the Test Temperature

For samples tested under normal laboratory conditions, select a standard digital viscometer. If the sample must be melted or maintained at elevated temperature during measurement, select an H-series high-temperature model.

Sample: asphalt / hot melt adhesive / polyethylene wax

3

Check the Required Rotational Speed

NDJ / SNB-RH: preset speeds
DV-1 Series: up to 99.9 RPM
DV-2 Series: up to 200 RPM

4

Select the Correct Spindle System

L-Series: L1 / L2 / L3 / L4
For LVDV and NDJ series.
R-Series: R2 / R3 / R4 / R5 / R6 / R7
For RVDV and HBDV standard models.
High-Temperature Series: 21 / 27 / 28 / 29
For dedicated high-temperature models.

Structure of Digital Rotational Viscometer

Structure of Digital Rotational Viscometer
LVDV Low Viscosity Viscometer
  1. It can be used to measure the absolute viscosity of Newtonian liquids and the apparent viscosity of non-Newtonian liquids.
  2. It is widely used to test the viscosity of oils, paints, plastics, coatings, detergents, medicines and other items.

Advantages of Digital Rotational Viscometer

  1. It can be used to describe shear thinning and time-dependent behavior and can measure the viscosity of opaque, settling or non-Newtonian fluids.
  2. The speed of the rotating part can be simply adjusted for easy operation.
  3. Connect to a computer via RS232 interface to facilitate automatic measurements.

Applications of Digital Viscometer

  • Paints, Coatings & Inks

Viscosity checks for liquid coatings, printing inks and related formulations.

  • Oils & Petrochemical Samples

Lubricating oils, mineral oils and related fluid products.

  • Adhesives & Chemical Formulations

Adhesives, polymer solutions, detergents and liquid chemical formulations.

  • Food & Daily Chemical Products

Syrups, sauces, lotions, creams and other flowable samples.

  • High-Temperature Materials

Selected high-temperature models are designed for materials such as asphalt, hot melt adhesive and polyethylene wax.

Digital Viscometer Measurement Workflow

  1. Prepare the Sample: Place approximately 10–20 mL of sample into the high-temperature sample container.
  2. Set the Test Temperature: Heat the sample to the required temperature within the available range.
  3. Select Spindle & Speed: Install the appropriate supplied spindle and select 5, 10, 20, 50 or 100 RPM.
  4. Run the Measurement: Monitor viscosity, torque and temperature directly from the display.
  5. Record or Analyze Data: Read the result directly or use optional VSoft for data collection and viscosity–temperature analysis.
Digital Viscometer Measurement Workflow

How to Calibrate a Viscometer?

The calibration process is a precise measurement process. If the data obtained is inaccurate, the more you calibrate, the worse the test results will be. The use of standard fluids has very high temperature requirements. It can’t be guaranteed that all customers have this condition or can operate the viscometer in a standardized manner, so viscometer manufacturers will not let customers calibrate themselves.

If customers insist on calibrating themselves, they can buy standard fluids for measurement. While trying to ensure the temperature conditions, if the measurement results are very different after comparison, the equipment needs to be returned to the factory for repair, otherwise it can continue to be used.

How to Select Digital Viscometer Spindle

  1. Spindles with mark * are optional.
  2. The NO. 21, 27, 28 and 29 spindles are equipped with small sample adaptor which is optional; temperature-controlled heaters are standard.
  3. K=1000, M=1000000.
Digital Viscometer Spindle

Digital Rotational Viscometer Optional Accessories

  • Extreme low viscometer adapter (with one spindle L0)
  • Small sample adapter (with spindle 21, 27, 28 and 29 each)
  • RTD temperature probe
  • Temperature-controlled heater
  • Printer
  • Data acquisition analysis and plotting software
  • DV programmable download software

Customer Feedback

customer reviews

Popular Digital Viscometer Comparison

Key ParameterDrawell RVDV-2Brookfield DV2Plus RVAnton Paar ViscoQC 300 R
Viscosity Range40–40,000,000 mPa·s100–40,000,000 mPa·s1.3–40,000,000 mPa·s
Speed Range0.1–200 RPM, stepless0.1–200 RPM0.01–250 RPM
Accuracy±1% F.S.±1% of range±1% F.S.
Standard Spindles6 × R-Series6 × RVR-Series system

Drawell provides a practical alternative for laboratories that need wide viscosity coverage, flexible speed control and multiple model options for low-, medium-, high- and high-temperature viscosity testing. 

Why Choose Us?

Competitive Price-to-Performance

Get the core viscosity measurement functions you need without paying extra for premium-brand features that may not be required for routine testing.

Wide Measurement Range

Cover 5–80,000,000 mPa·s, from many fluid formulations to higher-viscosity coatings, resins and adhesives.

More Models for Different Samples

Choose from low-, medium-, high-viscosity and high-temperature models up to 300°C, instead of forcing one instrument to cover every application.

Free Warranty and After-Sales

We provide a 1-year free warranty and remote guidance to help you address and resolve any issues. Throughout the after-sales period, we remain available to offer free online technical support.

Order Process

Order Process

FAQ

LVDV models are positioned for lower viscosity ranges, RVDV for medium viscosity, and HBDV for higher viscosity ranges.

DV-1 models provide speeds up to 99.9 RPM, while DV-2 models extend to 200 RPM.

Choose a high-temperature model when the sample must be heated or kept molten during viscosity measurement.

Selected models provide RS232/data-output capability and optional software. Check the individual model configuration before ordering.

No. Each model has a specified viscosity range that also depends on the spindle and rotational speed used.

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