![]() ![]() The selection of the right viscometer from the scores of instruments available to meet the need of any application is a difficult proposition. There are many different techniques for measuring viscosity, each suitable to specific circumstances and materials. Rheological relationships help us to understand the fluids we are working with so that we can either know how they are behaving or force them to behave according to our needs. They know that viscosity measurements are often the quickest, most accurate and most reliable way to analyze some of the most important factors affecting product performance. Many manufacturers now regard viscometers as a crucial part of their research, development, and process control programs. Anyone involved with flow characterization, in research or development, quality control or fluid transfer, at one time or another gets involved with some type of viscosity measurement. Viscosity measurements are made in conjunction with product quality and efficiency. Brookfield deals with liquids and semi-solids. Viscosity is a principal parameter when any flow measurements of fluids, such as liquids, semi-solids, gases and even solids are made. Manuals for Legacy Computrac and Jerome Instrumentsįind Viscosity-related information at AMETEK Brookfield Customer Learning Center.Manuals for Currently Released Computrac and Jerome Instruments.Certifications for Computrac and Jerome Products.Cone Plate Wells Brookfield Spindles Cups.DVNext Rheometer with Gel Timer Functionality.This is true for both dynamic as well as kinematic viscosities, matching the industry-relevant standards usually employed to measure the viscosities of liquids. Results achieved are realistic maximum ±5% accuracy when tested against values from certified viscosity reference materials. One relatively simple model discussed in this application note, for example, assumes that the temperature dependence of the viscosity of a substance follows an “Arrhenius-like” equation. Viscosities at arbitrary temperatures may be accessible via extrapolation. Since, in most cases, increasing the sample temperature decreases the viscosity, the technique presented here is suitable for substances with viscosities outside that range as well if the sample is measured at an elevated temperature. This application note describes the procedure to achieve viscosity measurements of Newtonian liquids with a digital density meter in the range of 1-3500 mPa*s (1-3500 cP). In this case, the viscosity is determined indirectly, measuring the flow resistance of the sample inside the U-tube caused by internal friction. However, a digital density meter that uses the vibrating U-tube technology for example, a METTLER TOLEDO Excellence Density Meter, can also be used to determine the viscosity of Newtonian liquid samples. The analytical instrument which is used to measure the viscosity of a fluid is known as a viscometer (also called a viscosimeter). Depending on their size and their interactions, they develop a flow resistance, giving rise to various viscosity effects. Liquids flow at different speeds-when a substance is moving, its molecules and particles slide and tumble alongside each other. User skills and knowledge (theory of applications, technologies, methods, tips and tricks).Time reduction quick adjustment and scalability of methods.Sustainable design (futureproof modular design long lasting).Shift to the next level measurement process (from manual to automated, or to on-line measurement automation). ![]() Reduction in operating costs Total cost of ownership Maintenance cost reduction.Productivity (released time from the team) Uptime Optimize processes.Preventive maintenance Minimize downtime.Connectivity Software solutions Data flow from one instrument to another. ![]()
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