viscosity are calculated values for L standard speeds (0.3 rpm to 60 rpm) The following tables give you an overview of the theoretical (calculated) viscosity range per measuring system. Hence, samples with a viscosity around 1 mPa.s (like water) can be measured with DG26 or UL26 and ViscoQC 100/300-L.Ī.3.3 Viscosity ranges per measuring system/spindle and torque model The largest surface area is provided by the double-gap and the ultra-low viscosity adapter system.Surface area decreases from CC26 to CC12.General rule of thumb for measuring systems: The lower the viscosity, the larger the surface area. If sample volume is limited ( <20 mL), an absolute measuring system (cylinder, double-gap, small sample adapter, ultra-low viscosity adapter), or a small vane spindle (V74, V75) is required. If large sample volumes (~500 mL) are available, both relative measuring systems (L1-L4 spindle, RH1-RH7 spindle, vane spindles V71-V75, T-Bar spindles), or absolute measuring systems (concentric cylinder, double-gap, small sample adapter, ultra-low viscosity adapter) can be used. It depends on the available sample volume and viscosity of the sample. ![]() A.3 Which spindle/measuring system should I choose? ![]() ** Manual input of reference density possible, no density measurement available. 200 BU for ViscoQC 100/300 – H (depending on measuring system) Typical samples: pastes, mayonnaise, peanut butter, ointmentsĪ.2 What information is displayed on ViscoQC? ViscoQC 100/300 - H for high-viscosity samples.Typical samples: paints, dairy products, shampoo, lotion ViscoQC 100/300 - R for medium-viscosity samples.Typical samples: solvents, oils, juices, mouthwash ViscoQC 100/300 - L for low-viscosity samples.*** With optional PTD 100 Cone-Plate, with RH1 spindle 800 mPa.sĪ.1 Which model should I choose for my sample? ** With optional PTD 100 Cone-Plate, with RH1 spindle 100 mPa.s * With optional PTD 100 Cone-Plate, with L1 spindle 15 mPa.s Options: keyboard, mouse, 2D bar code readerĮN, DE, ES, FR, IT, PT, JA, KO, RU, ZH-CN, ZH-TW, PO, CZEĮasiest spindle exchange (magnetic coupling)Īutomatic spindle recognition (Toolmaster™)Īutomatic speed searching function (TruMode™) 60 ☌ to +300 ☌ (temperature sensing with optional Pt100) +25 ☌ to +300 ☌ (for SSA/DIN with ETD 300)Īmbient to +100 ☌ (control of L/RH spindles with optional thermostat bath) ![]() ![]() Rotating bobs are more common, rotating cups reduce the likelihood of vortex formation, and "cone and plate" viscometers create a constant shear rate at any speed.Freely selectable speeds within the speed range Rotational viscometers use the concept of torque to measure the effort required to turn a disk or bob in a fluid. This can be done electronically for opaque fluids. You calculate viscosity by measuring the amount of time it takes for the liquid to move between two marks.įalling ball viscometers measure the time it takes for a sphere of a known size and density to descend through a stationary liquid. Liquid is drawn by suction into the upper bulb and allowed to flow down into the lower bulb. Glass capillary viscometers or Ostwald or Ubbelohde viscometers consist of a U-shaped glass tube held vertically in a controlled temperature bath. What Are the Different Types of Viscometers? Viscometers measure using a single flow condition. In general, viscometers move an object through a stationary fluid or move the fluid past a stationary object to measure the friction between the fluid and the object or surface.
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