Density and viscosity meters are based on a vibrating-element principle whereby vibration frequency is inversely proportional to fluid density. The viscosity meters build on this operational principle, but also measure additional frequency characteristics to determine liquid viscosity. All density and viscosity meters utilize an internal temperature measurement to account for changes in metal stiffness resulting from temperature changes.

Density and viscosity are valuable process variables that can be used to measure product quality, perform conversions between mass and volume, optimize efficiency, identify product interfaces and more, using densitometers and viscometers. Density and viscosity measurements are needed anywhere that liquid, gas, or slurry’s value, quality or composition is important. In short, density and viscosity measurements help identify a liquid, gas, or slurry, to determine its quantity and verify whether its makeup and measurement is correct.

Densitometers and viscometers are critical for any liquid, gas, or slurry process involving custody transfer, interface detection, blending, separating, evaporating or product change. Whether measuring crude oil density, percent concentration of a caustic cleaning solution or a sugar-water mix (degrees brix), these meters help drive revenue by delivering improved consistency, reduced waste and a positive customer perception of quality. Many processes utilize fluid density and viscosity measurements to improve productivity and throughput.