Simultaneous process density (specific gravity),
Single instrument for viscosity and temperature measurement
Small form factor for simple installation In Newtonian and non-Newtonian fluids
Stable, repeatable measurements in real time
Kinematic and dynamic viscosity measurements All metal (316L stainless steel) construction Not affected at all by installation conditions
7500psi (500bar) and
Operates at 575°F (300°C)
Threads, flanges and sanitary process fittings Easy cleaning, maintenance
or no reconfiguration required
Extend to multiple locations/installations without application re-engineering


Fluid measurement

Density range 0.4-1.5 g / cc
Density Accuracy 0.01 g/cc (0.001g/cc and higher accuracy available)
Viscosity range 1 to 3,000 cP (standard) wider range possible
Viscosity accuracy Offers accuracy better than 1% of reading (typical) to 5% of reading
Reproducibility Better than 1% of reading
Temperature Pt1000 (DIN EN 60751 cIass B)

Operating conditions

Process fluid temperature -40 up to 300°C (575°F)
Ambient temperature -40 up to 150°C
Pressure range Up to 7,500 psi (500 bar)

How it works

The Rheonics SRV fluid viscometer measures viscosity via a torsional resonator. A torsional resonator has one end immersed in the fluid under test.
The higher the viscosity of the fluid, the higher the mechanical damping of the resonator. By measuring the attenuation, the product of viscosity and density can be calculated using Rheonics’ proprietary algorithm. The resonator is excited and detected through an electromagnetic transducer mounted on the sensor body. Damping is measured with Rheonics’ patented sensing and evaluation electronics, which achieve stable, high accuracy and repeatable readings based on Rheonics’ proven gated phase-locked loop technology.