CAVIS-Capillary Viscometer


The CAVIS high-pressure capillary viscometer accurately determines the viscosity of single phase reservoir fluids. The apparatus is based on Poiseuille’s law; specifically the relationship between pressure drop, flow rate, fluid viscosity and pipe geometry for a Newtonian fluid flowing in the laminar regime (Re<2300) through a constant cross-section pipe. By measuring the pressure drop and flow rate, fluid viscosity can be deduced. The computer-controlled instrument consists of a high-pressure opposed pump, two highly accurate pressure transducers, an isothermal convection air bath and a capillary tube. Moreover, to augment the range of measurable viscosities, a set of four different diameter capillary tubes are supplied.


Viscosity range: 0,02 cp to 10,000 cp 
Sample volume: 10 ml
Pressure: 15,000 psi
Temperature: Ambient to 200 °C (400°F)
Temperature regulation: ± 0.5 °C
Pressure accuracy: 0.02% full scale
Wetted parts: stainless steel
Power supply: 220 VAC 50/60 Hz 


* Accurate viscosity measurement
* Provided with calibration procedure
* Broad viscosity range