A viscometer is a device used to measure the viscosity of a liquid. Usually a viscometer is often found in laboratories for experimental purposes. The thickness of the liquid needs to be known to find out the ideal liquid. The ideal liquid should not be thick, or have no viscosity. One type of viscometer is a hoppler viscometer.
What is a hoppler viscometer?
Hoppler viscometer functions the same as other viscometer, which is to measure viscosity in liquid. How it works from the hoppler viscometer is different from other viscometers. The uniqueness of the hoppler viscometer is the measurement of the time it takes for the ball to pass through a liquid that has a certain height. The iron ball can pass through the liquid because of the gravitational force that pulls the ball so it falls to the bottom.
Hoppler viscometer itself functions based on the law of Stokes. Due to applying this Stokes law, viscosity is measured using objects dropped on liquid. Objects dropped on a hoppler viscometer to measure viscosity must have a definite size. In the hoppler viscometer, the friction and gravity must be considered to ensure the thickness of the measured liquid.
What are the specifications of the hoppler viscometer?
Hoppler viscometer consists of several parts that function together to help measure the viscosity of liquid. The following are some parts of the hoppler viscometer and their functions:
- Steal ball: a viscosity gauge on the hoppler viscometer.
- Glass tube: a place to put liquid to be measured and steal ball to be dropped.
- Light barrier: a limit for knowing where measurements will begin and end.
- Pressure cell: the outside of the hoppler viscometer to protect the liquid to be measured so that it has a constant pressure.
How does the hoppler viscometer work?
To measure the viscosity (viscosity) of liquid using a hoppler viscometer, there are several procedures that must be followed properly. First, measure the diameter of the ball to be used, followed by weighing the mass of the ball. Furthermore, the length of the viscometer tube must be measured from the upper light barrier to the lower limit. Before starting to measure viscosity, determine the density of the liquids. Make sure the temperature of the hoppler viscometer first, then fill the hoppler viscometer tube using a liquid that will be measured for thickness.
The next step is to drop the ball (steal ball) from the iron or glass. Due to gravity, the ball can fall down. The fall of the ball can be seen as a function and price of the liquid being tested for its viscosity. Start turning on the stopwatch to measure the duration of the ball falling from the top of the light barrier to the bottom. Record the duration of time needed from the ball above to below the light barrier.
To ensure the accuracy of the measurement results, repeat the procedure 10 times in a row. What is distinguished from 10 times the procedure is the temperature of the liquid. To find the viscosity value of a liquid, use the data that has been recorded using the formula:
F = 6.π.η.r.v
F = stokes style
v = falling ball speed
r = fingers
η = viskositas
What are the advantages and disadvantages of a hoppler viscometer?
The advantage of a hoppler viscometer is that it is easy to apply. Does not require procedures and tools that are too difficult and complicated to implement. While the hoppler viscometer also has its own shortcomings, which is difficult to use to measure viscosity (viscosity) on liquid substances that are colored or not clear. In addition, the measurement of viscosity still requires calculation through formulas. Liquid samples are also needed a lot because the procedure must be repeated 10 times to ensure accuracy.
Thus the specification of the function of the hoppler viscometer. If you are looking for a hoppler or other type of viscometer, you can find it at Infiniti Bioanalitika Solusindo (IBS). IBS is ready to meet your needs because it sells a variety of laboratory equipment to support the quality of your experiments.