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Viscometers and their range of use<br />

Measurement substance property<br />

Viscometer type<br />

Ubbelohde<br />

Micro Ubbelohde<br />

TC Ubbelohde<br />

Ostwald<br />

Micro Ostwald<br />

Cannon-Fenske-Routine<br />

Cannon-Fenske reverse flow<br />

BS/IP-U tube reverse flow<br />

Transparent liquids<br />

manual measurement<br />

++ ++ - + + + o o<br />

Transparent liquids<br />

automatic measurement<br />

++ ++ + - + + - -<br />

Opaque liquids<br />

manual measurement<br />

Opaque liquids<br />

automatic measurement<br />

- - - - - - + + 2)<br />

Ubbel<br />

- - ++ 1) - - - - -<br />

Foaming liquids o o o + + + o o<br />

Liquid mixture with<br />

highly volatile components<br />

o o o + + + o o<br />

Minimum measurement substance<br />

and/or rinsing agent quantities<br />

- ++ - - + - - -<br />

High-temperature or lowtemperature<br />

measurements<br />

+ + + o o o o o<br />

Selection of glass capillary viscometers<br />

++ use preferably 1) up to 30,000 mm 2 /s<br />

+ highly suitable 2) above 30,000 mm 2 /s<br />

o less suitable<br />

- unsuitable<br />

198

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