Digital Rotational Viscometer, 100-13000000 mPa.s

Digital rotational viscometer offers 100 ~ 13,000,000 mPa.s viscometer measurement, with spindles of R2# ~ R7# and  0.3 ~ 100 rpm stepless speed. High sensitivity, good repeatablility and reliable results, the viscometer is a great choice for various fluids meausrement at the given range.

Features

• 5 inch colorful touch screen, simple and clear operation interface
• Digital viscometer can display abundant information including viscosity, temperature, shear stress, shear rate, rotating speed, rotor, etc.
• With multiple functions, such as timing measuring, automatic scanning, automatic measuring range display, etc., for more accurate and reliable measurement.
• The horizontal display unit is at the front of the viscometer, convenient to adjust.
• Stepless speed regulation, 0.3~100 rpm, a total of 998 speeds
• Optional temperature probe with measuring range of -20℃~300℃ and accuracy of 0.1℃

Specification

Note:

* When measuring the viscosity below this lower limit, you need to choose the R1# rotor.

** For optional accessories, please contact us if you need it.

Applications

The digital rotational viscometer is widely used in paints, coatings, cosmetics, inks, pulp, food, oil, starch, solvent-based adhesives, latex, biochemical products and other medium and high viscosity industries.

Tips: Types of Viscometers

The viscometer is an instrument for measuring the viscosity of fluids. There are mainly three categories of viscometers, i.e., capillary viscometer, rotational viscometer and falling ball viscometer according to the operation mode.

1. Capillary viscometer
The capillary viscometer is usually a saybolt viscometer and is a common viscometer. Its working principle is as follows. The sample container (including the outflow capillary) is filled with samples to be tested, in a constant temperature bath, and the height of the liquid column is h. Open the cock, the sample starts to flow to the receiver, and time is calculated until the sample liquid level reaches the scale. The larger the sample viscosity, the longer the period. Therefore, this period of time directly reflects the viscosity of the sample.

2. Rotational viscometer
The common rotary viscometer is a cone-plate viscometer. It mainly consists of a flat plate and a cone plate. The motor drives the plate to rotate at a constant speed through the variable speed gear, keeps the tested sample between the two plates by capillary action, and drives the cone plate to rotate by the friction between the sample molecules. Under the action of the torsion spring in the torque detector, the cone plate will not rotate after rotating at a certain angle. At this point, the torque applied by the torsion spring is related to the internal molecular friction (i.e., viscosity) of the tested sample: the higher the sample viscosity, the greater the torque. The torque detector is equipped with a variable capacitor whose moving plate rotates with the cone plate, thus changing the capacitance value of itself. The torsional spring torque reflected by this capacitance change is the viscosity of the measured sample, which is shown by the meter.

3. Vibrating viscometer
The principle of this viscometer is that an object in a fluid will be hindered by the fluid when it vibrates, and the size of this action is related to the viscosity of the fluid. The commonly used vibrating viscometer has an ultrasonic viscometer with a shrapnel in the detector. When excited by the pulse current, the shrapnel produces mechanical vibration in the ultrasonic range. When the shrapnel is immersed in the sample, the amplitude of the shrapnel is related to the viscosity and density of the sample. Given the density, the viscosity value can be obtained from the amplitude data.