Company Profile:

Shanghai Fangrui Instrument Co., Ltd. is a manufacturer of measuring instruments (with a license for manufacturing measuring instruments such as electronic scales and moisture meters).

The main products produced by the company include: digital rotary viscometer, high-precision electronic balance, and electronic microbalance; Fully automatic surface tension meter/interface tension meter; There are 7 series of laboratory instruments or devices with nearly 100 specifications, including contact angle meter/droplet angle meter, electronic density meter/specific gravity meter, constant temperature water bath (oil bath)/low-temperature constant temperature bath/ultra-low temperature constant temperature bath, particle analyzer (settling balance), etc.

All kinds of instruments or devices produced by our company are independently developed and produced, and have obtained national invention patents (ZL 2014 1 0280162.5) and utility model patents (ZL 2012 2 0171247.6; ZL 2011 2 0065224.2). Having independent intellectual property rights ensures that users can use it with peace of mind in the long term. All instruments produced can be sent for third-party verification by Shanghai Institute of Metrology and Testing Technology, with a one-year warranty and lifetime service.

Our company specializes in producing various digital rotational viscometers, including touch screen viscometers, large screen LCD rotational viscometers, Stormer viscometers, etc. For models not introduced here, please browse other pages on this website.

The newly designed SNB series digital rotational viscometer not only has modern aesthetic elements in appearance, but also has more convenient operation, more accurate measurement values, and more complete functions.

Adopting high-performance imported microcomputer chips, imported stepper motors and other key components, it has functions such as LCD backlight display, program setting, automatic control, timed measurement, automatic scanning, and error alarm. The screen directly displays information such as viscosity, temperature, timed measurement time, speed, rotor number, percentage specific torque, and the viscosity range that can be measured by the selected range. The full range and linearity of each gear of the viscometer are automatically calibrated by a computer based on the standard values of standard silicone oil, ensuring that the instrument has high sensitivity, high accuracy, and high repeatability. The measured data is accurate, reliable, and has good repeatability.

The SNB series viscometer can measure the viscosity of Newtonian liquids or the apparent viscosity of non Newtonian liquids. By using viscometer data processing software, the rheological properties of non Newtonian liquids can be analyzed.

The SNB series viscometer is widely used in the production industries, research institutions, and universities of fluids and semi fluids such as oils, paints, coatings, pastes, textiles, food, pharmaceuticals, adhesives, cosmetics, etc.

The main features of SNB series viscometer are:
1. The measurement data is displayed directly on the LCD screen without the need for secondary calculation. 2. Adopting microcomputer drive technology and imported stepper motor, the speed is stable and reliable. 3. Adopting switch mode power supply technology, the voltage and frequency range are wide, and the fluctuation of the power supply will not affect the measurement accuracy. 4. The horizontal display device is located on the front of the viscometer, and adjusting the level does not require standing, making it very convenient to use (new function added). 5. The viscosity value display accuracy is accurate to two decimal places, namely 0.01mPa. S (new function). 6. It has the function of timed measurement, which is very practical for detecting non Newtonian liquids (new feature). 7. Temperature probe can be selected to measure the temperature of the tested sample in real time. 8. It has an automatic scanning function, and the instrument can automatically recommend rotor and speed priority combinations. 9. It can automatically display the viscosity range that the selected combination can measure. 10. Equipped with a printing interface, it can directly connect to a micro printer to print various data (new feature). 11. Optional data processing software can be used to record in real time the changes in viscosity with time, speed, rotor (shear rate), and temperature, which provides a good method for understanding the viscosity and rheological properties of non Newtonian liquids.

Detailed technical parameters of SNB series viscometer:

Standard configuration of SNB-1, SNB-2 rotational viscometer:

host

rack

1-4 # rotors

Rotor protection frame

The power adapter

Standard configuration of SNB-1A rotational viscometer:

host

rack

21 #, 27 #, 28 #, 29 # rotors

External drum

The power adapter

SNB-1, SNB-2 rotational viscometer optional:

0 # rotor

temperature probe

Micro printer

Glass thermostatic cup

Viscometer specific constant temperature bath

Attachment 1: Detailed Introduction to the Low Temperature Constant Temperature Bath for Viscometers:

The DCN/HDCN series viscosity meter special low-temperature constant temperature bath adopts imported high-performance single-chip microcomputer control, self-tuning PID regulation, and imported temperature sensor for temperature measurement. High temperature control accuracy and low fluctuation; Adopting a fully sealed refrigeration compressor, it has high refrigeration efficiency and low noise.

The DCW series adopts a large screen LCD backlight display, with set temperature, actual temperature, heating, cooling, alarm and other information displayed on the LCD screen, clear and beautiful; The HDCN series adopts dual row luminous digital display, which displays the measured temperature and set temperature separately, making it easy to use. The instrument works stably and reliably, and is easy to operate.

The main features are:

1. Adopting microcomputer temperature control PID regulation and self-tuning control technology, the temperature control accuracy is high;

2. It has a break protection function to prevent the instrument from losing control;
3. There is a liquid level protection device that can effectively prevent various faults caused by empty burning of the heating tube;
4. The upper limit over temperature alarm function can be set by oneself. If it exceeds the range, it will immediately sound an alarm;

5. Fully enclosed refrigeration compressor, fast cooling, high efficiency, and low noise;

6. Horizontal structure, low workbench height, easy operation;

7. The instrument works stably and reliably;

8. Large screen backlit LCD, with clear and concise parameters, beautiful and attractive;

9. The circulation pump can perform constant temperature liquid external circulation and can be controlled;

The unique 75mm diameter circular hole can accommodate a 400ml high fever cup. The test sample can directly feel the controlled temperature in the constant temperature bath inside the high fever cup, and then the viscosity meter can measure directly inside the high fever cup. Compared with the old method of connecting a constant temperature cup with a latex tube, this is convenient, fast, and accurate in temperature control.

Main technical parameters:

DCN series

HDCN series

Attachment 2: Introduction to Viscometer Data Processing Software

There are two types of liquids: Newtonian liquids and non Newtonian liquids. The viscosity of Newtonian liquids is only related to temperature and decreases with increasing temperature. The viscosity of non Newtonian liquids is not only related to temperature, but also to shear rate, time, and changes in shear thinning or thickening. Pure liquids and solutions of low molecular weight substances belong to Newtonian liquids; Most liquids, such as polymer solutions, colloidal solutions, emulsions, suspensions, ointments, and heterogeneous solid-liquid systems, flow as non Newtonian liquids.

Ordinary digital viscometers without data processing functions measure the viscosity value at a certain point (at a specific temperature and time shear rate). If the tested sample is a Newtonian liquid, the viscosity value remains constant at a constant temperature, and the value at a certain point represents the viscosity of the liquid. However, if measuring non Newtonian liquids with viscosity that varies with speed, rotor, and time, it is much more difficult to obtain an accurate value.

Ordinary viscometers can measure the viscosity of Newtonian liquids, but they are not capable of measuring the apparent viscosity of non Newtonian liquids. Because ordinary viscometers have constantly changing viscosity data when testing non Newtonian liquids, it is difficult to obtain an accurate value.
The viscosity meter data processing software provided by our company is designed to accurately measure and comprehensively reflect the rheological properties of non Newtonian liquids. The main features of this data processing software are:
1. Automatically collect changes in viscosity and generate real-time viscosity versus time curves;
2. Curves and data can be accessed and printed;
3. Can test viscosity values at different temperatures, i.e. temperature change curves;
4. Various curves measured can automatically provide temperature and viscosity corresponding to different times