Publish Time: 2019-12-24 Origin: Site
Many industries need to measure the viscosity of liquid materials, but do you know which areas will be applied to the kinematic viscosity measuring instrument? What is the role of the kinematic viscosity meter? What precautions do you have when choosing a kinematic viscometer?
Application of kinematic viscometer
How does a kinematic viscometer affect food quality?
How to choose a good quality kinematic viscometer?
A kinematic viscometer measures viscosity, the ability of a fluid to resist flow or stress. In general, viscosity is related to the "thickness" of the fluid - the physical properties of which liquid, paste and paste manufacturers are very interested. Viscosity is a key property of foods, paints, cleaners, adhesives, polymers, fuel oils and pharmaceuticals. Many industries use viscosity as an end point for making liquid formulation products.
From simple mechanical kinematic viscometers to automatic instruments ranging from $ 100 to $ 15,000, dozens of kinematic viscometers are used in science, industry, and basic research. Rheometers that measure viscosity and related characteristics may cost $ 200,000. The lower end of the price range are U-tubes and Cannon-Fenske viscometers found in schools, universities and certain industries. Other simple designs include falling balls, falling pistons, balls and vibrating piston viscometers. They are not the most realistic tools. Some must pour liquid. Vibration viscometers and rotational viscometers used in the processing industry are more complex. The ultimate principle is that energy must be applied to the mandrel or disc, which rotates in the fluid to overcome the resistance to the fluid. Energy is directly proportional to the viscosity of the liquid. The rotary viscometer must not be filled with the sample to be tested.
The high-end kinematic viscometer can be connected to a computer and operated from a computer, or it can be read directly from the front panel display. Some industries prefer a viscometer. The paint and pigment industry prefers the Stormer viscometer, which uses blades that are immersed in the rotor in the product. Similarly, the resin laboratory uses a bubble viscometer that measures the time it takes for bubbles to exit the varnish, while petrochemical companies prefer a Stabinger viscometer that uses a rotating cylindrical tube.
In the fields of biotechnology and pharmacy, the viscosity of proteins and buffers is one of many quality tests. For beverages, viscosity is an indicator of sugar content and overall quality. Polymer scientists use viscosity to determine the concentration of plastic in acidic solutions. Viscosity measurements are usually made in dilute solutions and other concentrations. For example, secondary properties such as intrinsic viscosity, molecular weight, and chain length can be estimated by measuring the viscosity of polymer solutions at different strengths. Viscosity is related to the concentration of dissolved substances, so it is one of the most useful physical measurements in research and product development. Liquid viscosity tends to increase with the concentration of solutes (such as sugar) in water. However, the viscosity of a mixture of a fully miscible liquid and an unreacted liquid is usually between the viscosity of the components.
Buyers should be aware of useful kinematic viscosity measuring instrument /rheometer functions including temperature control, spindle speed control, a range of sample holders, and ease of use.
The texture of food is strongly affected by changes in viscosity. The chocolate industry relies on viscosity testing because the texture and fluidity of chocolate is difficult to manufacture and maintain. For example, the thickness of chocolate during melting will affect the final solid state. In order to obtain the correct density, texture and taste when the chocolate is hard, it is important to carefully consider the viscosity of the product when it is liquid. Viscosity plays a very important role in the baking industry because it affects the possibility of phase separation, which affects dough and dough products. During the baking process or when used with dough, precise positioning and viscosity can ensure phase separation at the appropriate time during the baking process, thereby affecting the quality of the baked food. If the viscosity of the dough is too low, the phases are easily separated at the wrong time, which leads to a decrease in the quality of the cake. Viscosity testing is a tool used in almost all food and beverage processes. This is a very important test that provides repeatable and reliable results, thereby ensuring not only the quality of the product from batch to batch, but also its quality.
The most common method of measuring and tracking viscosity is to use a kinematic viscometer. Thanks to rotary viscometer technology, today's kinematic viscosity measuring instrument s are very easy to use and powerful. These kinematic viscosity meter s measure a wide range of viscosities from 200 to 106 million with accuracy ranging from ±1% to ±0.2%. The measurement of product viscosity is based on immersing a particular selected spindle into the product sample. When the spindle rotates at a specific speed, vigorous stirring produces eddy currents. The torque required to rotate the spindle at the set speed is measured based on the resistance generated by the movement of the spindle in the liquid. The kinematic viscometer instrument senses the rotation and then mathematically converts the measured torque value to a viscosity value in centipoise (cP) or millipascal seconds (mPa.s).
1.The current task determines the type of kinematic viscometer to be used - different viscometers can measure different sizes of viscosity and different changes in viscosity. One expert believes that the most important factor to consider when purchasing a kinematic viscosity timer is robustness, even if the user has to give up some sensitivity. Six major questions you should ask when purchasing a viscosity timer:
2. What kind of temperature control and spindle speed control does the kinematic viscometer instrument provide? Temperature is critical because viscosity generally increases as the fluid cools. Spindle rotation also affects viscosity.
3. What range of accessories does the company offer for kinematic viscometer instruments (eg sample holders)?
4. How easy is it to use a kinematic viscometer? Since most users today are not experts, easy-to-use kinematic viscosity measuring instrument instruments are probably the best choice for most laboratories.
5. What is the sample size you want to process? This can be a problem when analyzing very expensive materials such as drugs or proteins, and the cost of ownership is also important for high volume applications.
6. What is the measurement range of the kinematic viscosity meter instrument? If you want to analyze oil, from crude oil to gasoline, do you want to replace the capillary for each measurement, or do you want to use a capillary viscometer that is always effective?
7. What kind of service and support does the kinematic viscometer company offer?
The application of kinematic viscometers is very extensive, so it is especially important to choose a standard kinematic viscosity meter. If you are looking for a reasonably priced high quality kinematic viscometer, NANJING T-BOTA SCIETECH INSTRUMENTS&EQUIPMENT CO.,LTD can provide you with the best products.