Fully Automatic Viscometer System: VMR-052UPC Series (5-Position)
The VMR-052UPC is RIGOSHA's long-selling five-position fully automatic viscometer system, developed to measure the kinematic viscosity of liquids as well as the relative viscosity, viscosity number, intrinsic viscosity, and viscosity-average molecular weight of plastics.
Manufacturer: Rigo — Japan
Overview
The VMR-052UPC is RIGOSHA's long-selling five-position fully automatic viscometer system, developed to measure the kinematic viscosity of liquids as well as the relative viscosity, viscosity number, intrinsic viscosity, and viscosity-average molecular weight of plastics. Simply placing the dedicated sample container in position triggers automatic sampling, temperature stabilization, and up to four repeated measurements. After measurement, the viscometer is automatically washed with solvent and dried by nitrogen purge, a cleaning cycle that also pre-rinses the sample container, so the entire test sequence runs without tying up an operator. Beyond the standard medium-temperature VMR-052UPC, the lineup includes the high-temperature VMR-053UPC and the VMR-052USPC for volatile samples.
Long-Standing Five-Position Platform
The VMR-052UPC line has been a mainstay of RIGOSHA's viscometer range, purpose-built for both liquid kinematic viscosity and polymer solution viscosity testing. Loading the dedicated sample container is the only manual step; the system automatically samples, thermostats, and measures the sample up to four times in succession. This repeatability supports the tight measurement tolerances required for polymer relative viscosity and molecular weight calculations.
Automatic Cleaning Cycle
After each measurement the viscometer is rinsed with solvent and dried under a nitrogen gas purge. This cleaning action also pre-cleans the sample container, so the operator is not required to intervene between tests. The result is a genuinely unattended viscosity measurement workflow from sample loading through to final cleaning.
Standard, High-Temperature, and Volatile-Sample Variants
The base VMR-052UPC covers medium-temperature testing, while the VMR-053UPC extends the same platform to high-temperature applications. The VMR-052USPC adds pressurized sampling to suppress evaporation, making it suitable for volatile polymer products such as polycarbonate solutions.
Common Specifications
| Specification | VMR-052UPC Series (5-Position) |
|---|---|
| Applicable Standards | JIS K2283 (Kinematic Viscosity); JIS K7367 (Viscosity Number and Intrinsic Viscosity of Polymers); JIS K6933 (Viscosity Number of Polyamide Plastics) |
| Viscometer Type | Modified Ubbelohde viscometer (UIS type) |
| Required Sample Amount | 10-50 mL |
| Measuring Range | 0.3-2,500 mm²/s |
| Measuring Accuracy | Within 0.02 sec difference between two measurements of pure solvent |
| Washing Method | Solvent washing |
Model Comparison
| Specification | VMR-052UPC (Medium-Temperature) | VMR-053UPC (High-Temperature) | VMR-052USPC (Volatile-Sample, Pressurized Sampling) |
|---|---|---|---|
| Operating Temperature Range | 20-100°C | 100-180°C | 20-40°C |
| Temperature Control Accuracy | Within ±0.01°C | Within ±0.03°C | Within ±0.01°C |
| Primary Application | Standard kinematic viscosity and polymer viscosity testing | High-temperature kinematic viscosity and polymer viscosity testing | Viscosity number/intrinsic viscosity testing of volatile polymers (e.g., polycarbonate) |