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Complete outstanding quality and functionality are delivered through METTLER TOLEDO's comprehensive range of laboratory balances and analytical instruments that provides users with flexibility and precision.
Viscosity & Density
Accurate determination of viscosity and density is essential for understanding the flow behavior and compositional characteristics of liquids across fuels, lubricants, chemicals, and specialty fluids. Combined viscosity-density measurement systems provide laboratories with a single platform to assess both dynamic and physical properties simultaneously, reducing sample handling, improving reproducibility, and enhancing workflow efficiency. These systems allow precise characterization of fluid behavior under varying conditions, which is crucial for quality control, regulatory compliance, and research applications.
The devices operate using advanced oscillating sensor technology, enabling simultaneous measurement of dynamic viscosity and density in real-time. Viscosity is assessed by monitoring the fluid’s resistance to shear under controlled oscillation, while density is determined by precise oscillation frequency changes of a vibrating U-tube immersed in the sample. This integrated approach ensures high accuracy for both properties, minimizing discrepancies that can occur when measurements are performed separately.
Temperature control is a critical aspect of combined viscosity-density measurement, as both properties are highly temperature-dependent. PAC systems include automated thermal management capable of heating or cooling samples with high uniformity, maintaining precise and stable temperatures throughout the measurement process. This feature allows laboratories to replicate operational conditions for fuels, oils, or chemical products, providing realistic property values for engineering calculations, formulation studies, and process design.
These systems are designed for broad applicability across multiple liquid types, from low-viscosity fuels and volatile solvents to high-viscosity oils and complex chemical blends. Accurate measurements are achievable even with small sample volumes, ensuring minimal waste and enabling laboratories to perform multiple tests efficiently. The instruments’ adaptability makes them suitable for R&D labs, industrial quality control, and regulatory testing, where reproducibility and precision are critical.
Data acquisition and analysis are fully automated, allowing simultaneous recording of viscosity and density values with high temporal resolution. Software integration calculates derived parameters, such as specific gravity and kinematic viscosity, while generating standardized reports for traceability. Historical datasets can be archived and reviewed for trend analysis, batch comparison, or compliance verification, providing laboratories with comprehensive and reliable documentation.
The robust construction of PAC combined viscosity-density systems ensures long-term stability and reliability for continuous laboratory operation. Safety features, such as over-temperature protection, automated calibration routines, and secure sample handling, minimize downtime and reduce maintenance needs. This durability supports high-throughput testing while maintaining the integrity of measurement data for hundreds or thousands of samples.
By simultaneously measuring viscosity and density, laboratories can evaluate fluid consistency, optimize chemical formulations, assess fuel performance, and ensure process safety. In petroleum and lubricant industries, accurate data help predict engine behavior, improve pump efficiency, and prevent deposit formation. In chemical manufacturing, the results inform process optimization, product standardization, and regulatory reporting. Integrated measurements save time, reduce sample variability, and improve confidence in laboratory results.
Combining advanced oscillation sensor technology, precise thermal control, and automated data acquisition, PAC systems deliver fast, accurate, and reproducible viscosity and density measurements. They enable laboratories to monitor fluid behavior continuously, support formulation research, ensure product quality, and comply with international standards. These systems are indispensable tools for industries that rely on detailed understanding of liquid properties to enhance performance, efficiency, and safety.