Product Range :
Cone Plate Wells Brookfield Rheometer
DV3T Touch Screen Rheometer
PVS Rheometer
RST Coaxial Cylinder Rheometer
RST Cone Plate Rheometer
RST Soft Solids Tester Rheometer
Summary :
CONE PLATE WELLS BROOKFIELD RHEOMETER
The Wells-Brookfield Cone/Plate Rheometer gives researchers a sophisticated instrument for routinely determining absolute viscosity of fluids in small sample volumes. Its cone and plate geometry provides the precision necessary for development of complete rheological data.
Principle Of Operation:
The Wells-Brookfield Cone/Plate Rheometer is a precise torque meter which is driven at discrete rotational speeds. The torque measuring system, which consists of a calibrated beryllium-copper spring connecting the drive mechanism to a rotating cone, senses the resistance to rotation caused by the presence of sample fluid between the cone and a stationary flat plate.
The resistance to the rotation of the cone produces a torque that is proportional to the shear stress in the fluid. This reading is easily converted to absolute centipoise units (mPa·s) from pre-calculated range charts. Alternatively, viscosity can be calculated from the known geometric constants of the cone, the rate of rotation, and the stress related torque.
The correct relative position of cone and plate is obtained by following a simple mechanical procedure without the need for external gauges or supplementary instrumentation.
The stationary plate forms the bottom of a sample cup which can be removed, filled with .5 ml to 2.0 ml of sample fluid (depending on cone in use), and remounted without disturbing the calibration. The sample cup is jacketed and has tube fittings for connection to a constant temperature circulating bath.
The system is accurate to within ±1.0% of full scale range. Reproducibility is to within ±0.2%. Working temperature range is from 0°C to 100°C.
Various cone spindles are available for use with the Wells-Brookfield Cone/Plate instruments. One cone spindle is provided with the instrument and is calibrated for use with the sample cup. Additional cone spindles may be purchased and will be calibrated for use with the same sample cup.
Versatility Of Application :
The Wells-Brookfield Cone/Plate Rheometer provides a wide variety of shear rates and viscosity ranges, which can be further extended by the use of interchangeable cone spindles. Different models can be selected to meet the specific range of viscosities and shear rates required.
Shear rates as high as 1875 sec-1 (DV3TCP) can be achieved.
The small sample volume required permits rheological evaluations to be made on materials where sample availability is limited, such as biological fluids and thick film coatings that contain precious metals.
All wetted parts are stainless steel for corrosion resistance and ease of cleaning. Optional purge fitting, luer fitting, and embedded temperature probe available.
Electronic Gap Setting :
Wells-Brookfield Cone/Plate Digital Rheometers are now supplied with an advanced Electronic Gap Setting feature. This technology allows faster set-up time and minimizes the possibility of gap adjustment errors. With the enhanced system, a bright LED lights up when a hit point is achieved. A simple turn of the micrometre adjustment ring and the gap is set, reducing the time required associated with manual detection methods.
The new electronic gap setting system is now a standard feature on our complete line of Wells-Brookfield Cone/Plate Digital Rheometers. These instruments provide precise shear profiles necessary to determine viscosity and develop rheological data.
Features & Benefits
• Determine absolute viscosity of small samples (0.5 - 2.0 mL)
• Precise shear rates for determining a material's flow curve behaviour
• Rapid temperature control due to small sample size
• Electronic gap adjustment for simplified setup and increased throughput
• Touch Screen Display available on DV3T Rheometers and DV2T Viscometers
• Auto-zero function to ensure precision torque measurement
• Auto-range function to define full scale range (FSR) for all spindle/speed combinations
• Torque measurement accuracy: 1% of full scale range
• Repeatability: 0.2% of full scale range
DV3T TOUCH SCREEN RHEOMETER
A 7-inch full color touch screen conveniently displays all test parameters along with measured values for yield stress, viscosity and temperature. On screen graphing shows real-time test data which can be captured in stand-alone mode, recorded on a printer or sent to a PC. Built-in math models, such as Power Law, can provide rapid data analysis for flow index and other selectable variables. Quick, straight-forward, single point viscosity is also easily accomplished with the DV3T making it the ideal "all-in-one" instrument for busy QC labs as well as demanding R&D departments doing comprehensive flow behaviour.
Features & Benefits
• 7-inch full color, touch screen display supports multiple languages
• Displayed info includes: viscosity (cP/mP·s), temperature (°C/°F), shear rate/stress, % torque, spindle/speed, step program status, math model calculations
• Enhanced Security with customizable user access, date/time stamp file, password access, portable log-in settings
• Built-In options include math modelling, yield tests, timed tests, data averaging, programmable QC limits/alarms, customizable speed/spindle lists, on screen data comparison
• Auto range shows maximum viscosity measured with any spindle/speed combination
• Analyse characteristics such as yield stress, flow curves, levelling and recovery
• Integrated temperature control with connection to a Brookfield TC series bath and AP Controller
• USB PC interface provides optional computer control and automatic data gathering capability (included)
• Download custom test programs with included PG Flash software
• Front-facing bubble level for convenient viewing
• Built-in temperature probe
• Accuracy of ±1.0% of range with displayed test data
• Repeatability of ±0.2%
• NIST traceable viscosity standards available
PVS RHEOMETER
The PVS is a dynamic coaxial cylinder, controlled shear rate rheometer allowing quick and easy viscosity measurements under pressure at temperatures where sample boil-off is a problem. The PVS can be used to simulate process conditions for small fluid samples in a laboratory benchtop environment. Applications include chemical compounds containing volatile materials, oil industry, drilling muds and fracturing fluids, processed foods, polymers and paints. Any test sample requiring absolute viscosity measurement under totally enclosed conditions is a viable candidate.
Features & Benefits
• Portable site-to-site mobility with 1' x 1' x 2' instrument footprint
• Rheovision software for automation and control of all test parameters
• Designed to operate in severe environments with Hastelloy cups and bobs standard
• Quick and easy to operate
• Measures samples from vacuum to high pressure of up to 1000 psi
• Safety relief valve included
• Measures under temperature conditions: -40°C to +260°C
• RTD temperature sensor on the inner cylinder surface insures accurate sample temperature
• Runs test to API industry standard
• LSRV measurements to 0.2 sec-1
• Simulation of In-Process conditions:
• Down Hole
• Cooking
• Blending
• Reactors
• Robust motor capable of speeds up to 1000 RPM
• Outside cylinder rotates at shear rates up to 1700 sec-1, spindle inside remains stationary
• Available with triple annulus geometry for increased sensitivity when measuring low viscosity fluids
• Quick and easy setup
• Complete with choice of spindle (bob), cup, Rheovision Software and computer
• Industrial standards
Principle Of Operation:
The outer cylinder (sample cup) is driven by a stepper motor at speeds from 0.05 RPM to 1000 RPM. The inner cylinder (bob) contains an RTD probe on the surface to provide temperature measurement where the shear stress is being measured. Several cup and bob designs with different geometries are available to suit various applications.
The unique torque tube design enables the instrument to respond to minute changes in viscosity, mechanically transmitting a rotational torque signal out of the pressure containment area without friction. Thus all electronics, bearings, and other sensitive components are completely protected from the influences of both the sample fluid and its vapour.
RST COAXIAL CYLINDER RHEOMETER
Rheological evaluation through controlled stress and controlled rate measurements offer superior viscosity profiling, thixotropic response, yield stress determination and creep analysis. The RST-CC Rheometer offers powerful flow characterization tools including ramp, loop, and single point testing. A wide range of shear rate, shear stress, and torque provide flexible flow analysis including creep and yield measurement. The RST-CC Rheometer is designed to accommodate the high throughput required of quality control laboratories providing cost effective, worry free operation for a variety of laboratory applications.
Features & Benefits
• Controlled stress/rate operation to analyse comprehensive flow behaviour
• Spindle barcode for auto spindle recognition
• Quick and easy automatic or manual gap setting
• Rapid temperature control of plate with Peltier option for quick profiling of viscosity vs. temperature
• User-friendly LCD touch screen with graphical display
• 11 memory slots for structured multi-step test programs
• Auto spindle identity recognition
• Quick connect coupling for easy spindle attachment
• Optional Rheo 3000 Software for PC control and data management
• 21 CFR compliance for controlled user access and data security
• Temperature control from -20°C to180°C with choice of direct immersion in bath or external circulation using the FTKY3 water jacket
RST CONE PLATE RHEOMETER
The RST-CPS Rheometer is great for cone and plate as well as plate to plate system for small volumes and wide shear rate ranges. Rheological evaluation through controlled stress and controlled rate measurements provide comprehensive viscosity flow curves, thixotropic response, yield stress determination creep analysis and viscosity vs. temperature profiling.
Features & Benefits
• Controlled stress/rate operation to analyse comprehensive flow behaviour
• Spindle barcode for auto spindle recognition
• Quick and easy automatic or manual gap setting
• Rapid temperature control of plate with Peltier option for quick profiling of viscosity vs. temperature
• User-friendly LCD touch screen with graphical display
• 11 memory slots for structured multi-step test programs
• Auto spindle identity recognition
• Quick connect coupling for easy spindle attachment
• Optional Rheo 3000 Software for PC control and data management
• 21 CFR compliance for controlled user access and data security
RST SOFT SOLIDS TESTER RHEOMETER
The RST-SST is a high end, touch screen rheometer that uses vane spindle geometry in both controlled stress and controlled rate modes to characterize creep behaviour as well as yield stress and viscosity profiles.
Features & Benefits
• Controlled stress/rate operation to analyse comprehensive flow behaviour
• Capable of measurements in BU units for viscous material such as joint compound
• Easy test methods for materials with particulate, slurries and stiff pastes with data for viscoelastic characteristics such as yield stress, shear modulus and creep
• Quantifies properties like wobbliness, sloppiness, consistency and texture
• Spindle barcode for auto spindle recognition
• Quick and easy automatic or manual gap setting
• User-friendly LCD touch screen with graphical display
• 11 memory slots for structured multi-step test programs
• Auto spindle identity recognition
• Quick connect coupling for easy spindle attachment
• Can also be used with coaxial cylinders for flow curve analysis
• Optional Rheo 3000 Software for PC control and data management
• 21 CFR compliance for controlled user access and data security
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