The standard was introduced in 2012, and the differences from the original standard are described as follows:
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 5561-1994 "Method for determining viscosity and flow properties of surfactants using a rotary viscometer". Compared with GB/T 5561-1994, the main changes are as follows:
- Added preface;
- The model, measuring instrument, range, and error of the rotary viscometer have been removed (see 5.1 of 6.11994 edition)
This standard was prepared using the redrafting method with reference to ISO 6388:1989 "Determination of flowability using a rotational viscometer for surfactants", and its consistency with ISO 6388:1989 is non equivalent.
This standard was proposed by the China Petroleum and Chemical Industry Federation.
This standard is under the jurisdiction of the Interface Active Agent Technical Committee (SAC/TC 63/SC 8) of the National Chemical Standardization Technical Committee (Special).

Related instrument recommendation: The NDJ-79 rotary viscometer produced by Shanghai Yutong Instrument and Meter Factory is introduced as follows:

Overview of NDJ-79 rotational viscometer:
This viscometer has the characteristics of small size, light weight, easy use, simple maintenance, durability, and the ability to quickly and reliably measure liquid viscosity. A precision instrument suitable for measuring the viscosity of various Newtonian liquids and the apparent viscosity of non Newtonian liquids in laboratories and factories. This viscometer can measure the viscosity of petroleum, resin, paint, ink, slurry, cosmetics, cream, medicine, asphalt, etc. For liquids of different viscosities or different measurement requirements, different measurement units can be selected for measurement.

Technical characteristics:
1. The exterior design is innovative, using a curved dial for easy reading.
2. This instrument is driven by a miniature synchronous motor, which rotates at a constant speed and is not affected by changes in load and power supply voltage.
3. Equipped with two types of testing units, each unit includes a measuring container and several rotating drums with shafts, meeting the testing requirements of each sample.

Indicators and parameters:
1. Measuring device: divided into II and III units;
2.转 速： 750r/min、75r/min、7.5r/min；
3. Measurement range: (1~1 × 106) mPa · s;
4. Measurement error: ± 5% (for Newtonian bodies);
5. Power supply: AC220V ± 10%, 50Hz;
6. Dimensions: 170mm × 140mm × 440mm;
7. Instrument weight: 15kg.

Product link:Rotational viscometer

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