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    Digital Rotational Viscometer, 3-1600000 mPa.s

    5 out of 5 based on 2 reviews | Write a review
    A compact digital rotational viscometer provides accurate measurement of fluid viscosity and features an intuitive interface and easy-to-use controls. The measurement range is 3-1600000 mPa.s and the rotor can be selected from 18#, 25#, 31#, 34#. ATO digital rotational viscometers offer high accuracy and reliability, making them an essential tool for laboratory and industrial environments.
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    Buy a low cost digital viscometer online with a measurement range of 3-1600000 mPa.s, allowing users to measure the viscosity of a wide range of fluids, including liquids and semi-solids. Our rotational viscometers provide accurate measurements of fluid viscosity, which make them ideal for quality control, research and development purposes.


    • The digital rotational viscometer can measure the viscosity of a Newtonian liquid or the apparent viscosity of a non-Newtonian liquid.
    • The digital display shows the measurement data directly, easy to read.
    • Adopt the advanced micro-computer drive technology and stepper motor, accurate and stable rotating speed.
    • The horizontal display unit is at the front of the viscometer, convenient to adjust.
    • The viscosity measurement range of the selected rotor and rotating speed is automatically displayed.
    • Two RS232 interfaces with direct connection to micro printer and computer


    Model ATO-LV-SSR
    Rotating Speed(r/min) 0.3/0.6/1.5/3/6/10/12/15/20/25/30/40/50/60/70/80/90/100 
    Rotor 18#,25#,31#,34# (standard configuration
    Measuring Range 3~1,600,000 mPa.s
    Sample Size 18# Rotor:3-10K; 7ml
    25# Rotor:480-1.6M, 9ml
    31# Rotor:30 –100K, 10.5ml
    34# Rotor:60 –200K, 11ml
    Measurement Error ±2%  (Newtonian liquid)
    Repetitive Error ±1.5%  (Newtonian liquid)
    Output Interface Two RS232 ports for printer and computer connection
    Temperature Probe Interface Standard configuration
    Dimension  300 × 300 × 450mm
    Weight 8.5kg


    The digital rotary viscometer is widely applied in the fluid & semi-fluid manufacturing, scientific research institutes, universities or laboratories for viscosity measurement of oils, greases, paints, coatings, pulp, textiles, food, pharmaceuticals, adhesives and cosmetics, etc.

    Rotational Viscometer Applications

    Tips: How does the digital rotational viscometer measure viscosity?

    A digital rotational viscometer measures the viscosity of a fluid by measuring the torque required to rotate a spindle at a constant speed inside the fluid.

    The viscometer consists of a spindle or rotor that is suspended from an arm or shaft and immersed in the fluid whose viscosity is to be measured. The spindle is connected to a motor that rotates it at a constant speed while the arm is fixed in place. The spindle experiences resistance to its motion due to the viscosity of the fluid, which generates a torque that can be measured by a sensor.

    The torque sensor is connected to a digital display unit that measures the torque and displays it as viscosity units. The digital display unit can be programmed to display the viscosity in different units such as centipoise or millipascal seconds, depending on the user's requirements.

    The rotational speed of the spindle is also a factor in the measurement of viscosity. The viscometer typically has different speed settings which can be adjusted to ensure that the measurement is accurate for the particular fluid being tested.

    Overall, the digital rotational viscometer provides a precise and accurate method for measuring the viscosity of fluids, which is useful in a wide range of industries such as pharmaceuticals, food and beverage, and petroleum.

    Existing reviews of Digital Rotational Viscometer, 3-1600000 mPa.s
    Are there any overall cleaning advice of rotational viscometer?
    I recently purchased the  ATO-VISCO-SSR. I have been cleaning the rotor and cup between runs with isopropyl and have noticed a build-up and a slight visual discoloration on the rotor.
    Are there any specific organic solvent recommendations?
    Are there any overall cleaning recommendations?
    From: duran | Date: 18/07/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The rotors are all 304 stainless steel, not resistant to strong acids and alkalis.
    You can use common solvents like alcohol, or acetone.
    The rotor and cup can also be wiped with toilet paper.
    Rotary viscometer calibration procedure
    I recently purchased the LV-SSR rotary viscometer. What is the recommended calibration procedure and method for the ATO viscometers? There is no information in the manual or on your website.
    Also, the viscosity range I will most likely be using is between 100-200 CP, using the 18 rotor.
    From: joy | Date: 06/06/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    Sorry for the late response.
    Calibration of the viscometer requires the purchase of a standard viscosity fluid and an accurate constant temperature at 25°C. Measure the viscosity of the standard viscosity liquid.
    If the error with the standard value of the standard viscosity liquid is greater than ±5%, calibration is required.
    Calibration requires two conditions:
    1. Standard viscosity liquid.
    2. A constant temperature bath that can precisely control the temperature at 25°C.
    For standard viscosity liquid, please refer to the following specifications. Standard silicone oil comes in various specifications, 450ml per bottle:
    1. 47.42mPa.S
    2. 341.1mPa.S
    3. 4749mPa.S
    4. 9853mPa.S
    The specific viscosity value shall be subject to the shipping label.
    Hope my explanation is able to assist you. Please feel free to let us know if you have any further questions.
    e measurement range of No. 18 rotor is 3-10000 (10,000) mPa.S (CP), No problem.
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