Digital Rotary Viscometers for Routine and Advanced Viscosity Measurement
The LVDV-1 and LVDV-2 are digital rotary viscometers designed for viscosity measurement across a broad range of laboratory and industrial samples. Automatic range guidance, timed measurement, shear data display, and optional temperature and low-volume accessories support a wide variety of test requirements.
- Models
- LVDV-1 and LVDV-2
- Viscosity Range
- Up to 6,000,000 mPa·s
- Measurement Accuracy
- ±1% for Newtonian fluids
- Data Interfaces
- Two USB ports
Suitable Sample Types and Industries
The LVDV Series is intended for routine viscosity testing in laboratories, quality-control departments, and production environments.
- Paints and coatings
- Cosmetics
- Printing inks
- Pulp and paper products
- Food products
- Petroleum products
- Starch
- Adhesives and latex
- Biochemical products
With the optional high-temperature furnace, the instrument can also measure heated, molten samples such as asphalt, hot-melt adhesive, and polyethylene wax.
Measurement and Operating Features
- Each viscosity range is computer-calibrated for high measurement accuracy and low error.
- A front-mounted level indicator makes instrument leveling intuitive and convenient.
- An optional Pt100 probe provides temperature measurement from −20 to 300 °C with 0.1 °C accuracy.
- Optional ULR and ULR PLUS ultra-low-viscosity adapters support accurate measurement from 1 mPa·s.
- Optional SSR and SSR PLUS small-sample adapters require only 7–11 mL per measurement.
- Available accessories include thermostatic baths, thermostatic cups, printers, and standard silicone viscosity samples.
- Automatic scanning and timed measurement functions simplify method setup and routine testing.
- Automatic prompts assist with viscosity measurement and stability assessment.
- The display shows shear rate and shear stress.
- Selectable viscosity units include Pa·s, mPa·s, P, and cP.
- Temperature results can be displayed in degrees Celsius or Fahrenheit.
- Two USB interfaces support connection to a printer and a computer.
- The operating system can be switched between Chinese and English.
Spring torque, spindle geometry, rotational speeds, and viscosity ranges follow commonly used rotary viscometer conventions, supporting comparison with similar imported instruments.
LVDV-1 and LVDV-2 Technical Specifications
| Parameter | LVDV-1 | LVDV-2 |
|---|---|---|
| Display | Liquid crystal display | |
| Speed Range | 0.3–100 rpm; 37 speeds | 0.1–200 rpm; 58 speeds |
| Viscosity Range | 0.6–2,000,000 mPa·s | 0.3–6,000,000 mPa·s |
| Sample Volume | Spindles 1–4: 300–400 mL Spindles 18, 25, 31, and 34: 7–11 mL ULR adapter: 21 mL |
|
| Measurement Error | ±1% for Newtonian fluids | |
| Repeatability Error | ±0.5% for Newtonian fluids | |
| Shear Stress and Shear Rate Display | Standard | |
| Timed Measurement | Standard | |
| Temperature Measurement | Standard Pt100 probe interface; temperature probe optional | |
| Automatic Scanning | Automatically scans and recommends a suitable spindle and speed combination | |
| Maximum Measurement Range Display | Automatically displays the measurable viscosity range for the selected spindle and speed | |
| Printing | Standard printer interface; data and curve printing with an optional printer | |
| Data Output | Two USB interfaces for printer and computer connection | |
| Thermostatic Accessories | Optional thermostatic bath and thermostatic cup | |
| Power Supply | 110 V, 60 Hz or 220 V, 50 Hz | |
| Dimensions | 300 × 300 × 450 mm | |
Accessories for Temperature, Low-Viscosity, and Small-Sample Testing
Pt100 Temperature Probe
Temperature measurement from −20 to 300 °C with 0.1 °C accuracy.
ULR or ULR PLUS Adapter
Ultra-low-viscosity measurement from 1 mPa·s; typical sample volume 21 mL.
SSR or SSR PLUS Adapter
Small-sample measurement using approximately 7–11 mL.
Thermostatic Bath or Cup
Temperature-controlled sample testing with compatible thermostatic accessories.
Printer
Print measurement data and curves through the standard printer interface.
Viscosity Standards
Standard silicone oils for viscosity verification and measurement checks.
High-Temperature Furnace
Measurement of heated, molten materials including asphalt, hot-melt adhesive, and polyethylene wax.
Low-Viscosity and Sample-Volume Requirements
- Measurements below 10 mPa·s require the optional ULR adapter.
- The stated practical lower limit for accurate measurement is 1 mPa·s.
- Accuracy and repeatability values are specified for Newtonian fluids.
Product Catalog and Measurement Guide
Download the LVDV Series catalog or review the fundamental operating principles of laboratory viscometers.
