Automatic relative viscometer

The automatic relative viscometer complies with ASTM D 5225 standard and is suitable for determining the relative viscosity of polymer dilute solutions. Its working principle is to measure the pressure drop generated by the continuous forced flow of solvent and sample solution through two series connected stainless steel capillary tubes (or PTFE capillary tubes, depending on the application)

1、 Product Introduction

　　Automatic relative viscometerCompliant with ASTM D 5225 standard, it is suitable for determining the relative viscosity of polymer dilute solutions. Its working principle is to measure the pressure drop generated by the continuous forced flow of solvent and sample solution through two series connected stainless steel capillary tubes (or PTFE capillary tubes, depending on the application).

　　Automatic relative viscometerSimultaneously measuring the viscosity of the solution and solvent avoids errors caused by temperature fluctuations and solvent changes, improving the accuracy and reproducibility of the test results. Provides faster measurements and more accurate results than conventional glass tube viscometers (Ubbelohde, Augsburg, and their automatic viscometers).

As soon as the machine is turned on and the mobile phase is running, automatic cleaning of the capillaries and automatic testing of blank values are achieved. When the pressure ratio between the two capillaries stabilizes, testing can begin, usually taking only a few minutes to stabilize.

2、 Product advantages

The RV300 instrument is designed and manufactured strictly in accordance with Poiseurle's law, and follows the same testing principles as traditional Ubbelohde capillary viscometers, Auger capillary viscometers, and Pinker capillary viscometers, all of which follow Poiseurle's law. The test results are highly consistent with those obtained using Ubbelohde capillary viscometers! However, traditional glass capillary viscometers measure flow rate (outflow time) under a constant pressure, while our viscometer measures pressure changes under a constant flow rate. Compared with it, the pressure method has higher sensitivity, generally one or two orders of magnitude higher than the Ubbelohde capillary viscometer (photoelectric detector)! It is countless times higher than manual labor. Especially suitable for testing the intrinsic viscosity of high, ultra-high molecular weight, and ultra-high viscosity polymer samples.