FAQ

What process connections are available for ViscoScope sensors?
The sensor can be supplied with any customized or standard flange. Normal flange sizes range from DN50 / 2" to DN250 / 10". However, special versions with different dimensions or antiseptic fittings for installation with zero dead volume are also available. So what flange do you require? We have never yet failed to realise a process connection.

What advantages do ViscoScope viscometers based on the principle of oscillating torsion have over other vibrational viscometers?
The oscillating torsion principle enables the sensor to make accurate measurements regardless of the type of flow or its direction. The flow may be laminar or turbulent and pass the sensor in a lateral or axial direction. It makes no difference. Experiments using oils which are independent of shear rate have proven this is the case. Furthermore, gas bubbles in the medium do not affect performance of the viscometer. Oscillating torsion generates a shear wave that only penetrates the medium to a very shallow depth. In other words, if a gas bubble touches the probe, the viscometer measures only the liquid film of the gas bubble The shear wave is unable to penetrate the bubble itself.

Must the sensor be installed in a specific position?
No, the sensor can be installed in any orientation in a tank, pipe or reactor. However, it should be installed in a sensible location that allows the measurement to be used to provide the best possible control and regulation of the process. Please do not hesitate to contact us. We look forward to offering you the benefit of our extensive experience.

Are measurements affected by vibrations caused by other equipment?
Vibrations are produced by pumps or agitators. However, these are dampened by the mass in a pipe or tank. Through appropriate sensor design and the use of an electronic filter, we have been able to eliminate these influences and guarantee that measurements are both accurate and reproducible.

Does the system require maintenance?
As the system's resonance frequency operates at a low amplitude, the sensor is not subject to alteration or material fatigue. The probe is completely welded so there are no bearings or seals on the sensor nor any moving parts. Our systems have been running continuously round-the-clock for more than 10 years in many applications. The viscometer requires no calibration inspection. QM guidelines, however, often require an annual calibration check to be performed. Please contact us if you wish us to inspect your system.

Are ViscoScope viscometers suitable for use with any liquid?
ViscoScope viscometers can be used with all liquids from low viscosity emulsions to high viscosity polymer melts. Measurements are reproducible with both Newtonian and non-Newtonian fluids.

What temperature and pressure ranges can the sensor be used in?
The VA-300 sensor can withstand process temperatures of up to 840F (450C) and customized designs temperatures as high as 2730F (1500C). The process pressure is limited by the flange.