Description
Cannon-Fenske viscometer 7,0–35,0 mm²/s is a reverse-flow glass capillary instrument intended for kinematic viscosity measurements on opaque media. With an overall length of 295 mm and capillary no. 150, it addresses the measuring range 7–35 mm²/s and carries the instrument constant K of 0,035 mm²/s². The Cannon-Fenske reverse-flow geometry keeps the working meniscus visible even when the sample is dark, turbid or otherwise non-transparent, so the tube is well suited to industrial oils, pigmented formulations and similar fluids that are difficult to read in conventional U-tube viscometers. After thermal equilibration in a controlled bath, efflux time is timed and converted to kinematic viscosity by means of the stated constant. Supplied as one piece from manufacturer Witeg, the instrument has a net weight of 0,075 kg and a compact 295 mm profile that fits common viscosity baths. It supports routine laboratory and quality-control work requiring reliable data on opaque liquids within the mid-range viscosity window.
This article is part of Viscometers, in Density & viscosity measurement.
Key features
- Pack size: 1 pc
- Design: Cannon-Fenske reverse-flow
- Length: 295 mm
- Capillary no.: 150
- Measuring range: 7–35 mm²/s
- Constant K: 0,035 mm²/s²
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Questions about Viscometer Cannon Fenske 7,0-35,0
What is this article?
Viscometer Cannon Fenske 7,0-35,0 is the article on this page. Luminix Health distributes Witeg for laboratory use. It sits in Viscometers, inside Density & viscosity measurement, in Lab instruments.
A capillary viscometer times the flow of a liquid through a tube. A rotational viscometer twists a spindle in the liquid. Both need a stated temperature. Kinematic and dynamic viscosity are different numbers. The capillary size has to put the flow time in the range the method allows.
Density is mass divided by volume. A hydrometer floats at a depth that depends on the density of the liquid. A pycnometer is a vessel of known volume that is weighed full. Viscosity is the resistance to flow. A capillary viscometer times how long a volume takes to fall through a tube. Both measurements need a stated temperature, because liquids change density and viscosity as they warm. The units trace to the BIPM and to NIST.
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The category is Density & viscosity measurement. The sub-category is Viscometers. The catalogue is Lab instruments.
Shelves beside this one are Hydrometers and Density meters & pycnometers.
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