Viscometer and methods for using the same

A technology of viscometer and viscosity value, which is applied to the flow characteristics of non-Newtonian fluids, the measurement of DC flow characteristics, instruments, etc., and can solve the problems of undisclosed portability

Active Publication Date: 2017-02-15
RHEOSENSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A simple precision liquid dispensing system that is portable and

Method used

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  • Viscometer and methods for using the same
  • Viscometer and methods for using the same
  • Viscometer and methods for using the same

Examples

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Embodiment Construction

[0045] According to some embodiments, an improved viscometer is described that is portable, easier to use, more accurate, and has a faster method of measuring the viscosity of liquid samples than prior art viscometers method. refer to figure 1 , a viscometer 22 comprising: a precision pump, generally indicated by reference numeral 20; a liquid container 14 for supplying a liquid sample desired for viscosity measurement; a flow through a viscosity sensor 15; a controller 18; and a display 19.

[0046] The pump 20 is used in conjunction with the illustrated sample container, referred to as a pipette 14, and the pipette 14 has a pipette barrel or body 13 and a plunger 12 slidably positioned in Pipette barrel 13 , and plunger tip 24 extends from the end of barrel 13 . The pipette 14 can be removably positioned and retained in the viscometer by means of the mounting mechanism 28 so that the pipette can be removed, filled with a liquid sample to be tested, and then placed back i...

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PUM

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Abstract

A viscometer includes a viscosity sensor with a liquid flow channel and at least two pressure sensors positioned along the liquid flow channel and configured to measure a pressure drop of a liquid flowing through the liquid flow channel, and a dispensing mechanism configured to cause dispensing of a liquid from the syringe to the viscosity sensor at a known flow rate. The dispensing mechanism and the viscosity sensor are configured to couple with a syringe configured to contain a liquid. The viscometer further includes an electronic controller configured to control operations of the dispensing mechanism and receive and process data from the viscosity sensor. The viscometer includes a sample loading interface, included in the syringe, through which the viscometer is configured to receive the liquid. The sample loading interface includes a selection valve coupled with, and located between, the viscosity sensor and the syringe.

Description

technical field [0001] The present application generally relates to viscometers, including but not limited to viscometers that utilize flow-through type viscosity sensors to measure the viscosity of liquids. Background technique [0002] Viscosity is a measure of a liquid's resistance to flow, and the viscosity value depends on the deformation rate for non-Newtonian liquids, as described in Dynamics of Polymeric Liquids, Vol. 1, 1987 by R.B. Bird, R.C. Armstrong and O. Hassager. The deformation rate is given by the shear rate in units of (time)-1. Viscosities measured at known shear rates are "true" viscosities. The dependence of true viscosity on shear rate is the viscosity profile which characterizes the material and is an important consideration for efficient processing. In many cases, however, viscosity is measured under ambiguous test conditions such that shear rates cannot be known or calculated. In cases of ambiguity, measured viscosity values ​​are "apparent" only...

Claims

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Application Information

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IPC IPC(8): G01N11/04
CPCG01N11/08G01N33/487G01N2011/002G01N11/02G01N25/04G01N2011/0026
Inventor 白成基
Owner RHEOSENSE
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