The NDJ-1 rotary viscometer is used to measure the viscous resistance and absolute viscosity of liquids. It is widely used to determine the viscosity of various fluids such as oils, paints, plastics, food, drugs, cosmetics, adhesives, etc. It is a precision instrument for monitoring and controlling product viscosity in the production and research process of industrial and mining enterprises, colleges and universities, research institutes, and other units. It is an important means to stabilize and improve product quality.

Technical parameters of NDJ-1 rotary viscometer·
Measurement range: 1-100000 millipascals per second (mPa · s)
Rotor specifications: 5 types of rotors: 0, 1, 2, 3, and 4 (rotor 0 is an optional accessory and can measure low viscosity up to 0.1 mPa · s)
Instrument speed: 6 revolutions per minute, 12 revolutions per minute, 30 revolutions per minute, 60 revolutions per minute
Measurement error: ± 5% (Newtonian fluid)
Power supply: 220V ± 22V 50Hz
Net weight: 1.5 kilograms (Kg)
Dimensions: 400 × 370 × 150 millimeters (mm)

Structure principle and characteristics of NDJ-1 rotary viscometer
1. The instrument is rotated at a stable speed by a stepper motor, connected to a dial, and driven by a balance spring and a shaft to rotate the rotor. If the rotor is not subjected to liquid resistance, the balance spring, pointer, and dial rotate at the same speed, and the pointer indicates a reading of "0" on the dial. On the contrary, if the rotor is subjected to the viscous resistance of the liquid, the balance spring generates torque, which counteracts the viscous resistance and finally reaches equilibrium. At this time, the pointer connected to the balance spring indicates a certain reading on the dial (i.e. the torsion angle of the balance spring). Multiplying the reading by a specific coefficient gives the viscosity of the liquid.
2. The instrument speed is adjusted by the gear system and clutch through the speed control rotary knob, divided into four speeds, and selected according to the measurement needs.
3. The instrument is equipped with four types of rotors from 1 to 4 or five types of rotors from 0 to 4 according to different specifications (rotor 0 is optional), which can be selected according to the viscosity of the measured liquid and the speed.
4. The instrument is equipped with a pointer fixed control mechanism for accurate reading. When the speed is fast (30 revolutions per minute, 60 revolutions per minute), it is not possible to read during rotation. At this time, gently press the pointer control lever to fix the pointer and turn off the reading.
5. The protective frame is used for stable measurement and protection of the rotor. Using a protective frame for measurement can achieve relatively stable results.
6. The instrument is equipped with a fixed bracket and a lifting mechanism, and is generally used for small and constant temperature measurements in the laboratory. Fix the instrument on the base to ensure measurement accuracy.
7. Rotor 0 is used as a reference measurement when the viscosity is below 20 m · Pas.
8. This instrument has a gear and damping lifting mechanism, ensuring smooth lifting and lowering of the instrument.
9. The entire instrument has good shockproof packaging to ensure its precision.

NDJ-1 rotary viscometer standard components and optional parts

Price including tax for NDJ-1 rotary viscometer： RMB 3500.00 (including instrument host, standard components, shipping, and one-year factory return warranty service).

Introduction to Shanghai Zhongchen
Shanghai Zhongchen Digital Technology Equipment Co., Ltd. is a high-tech enterprise in Shanghai. The company relies on well-known domestic universities and research institutions, widely adopts the latest scientific and technological achievements of relevant experts at home and abroad, and focuses on the development of performance measurement technology products such as colloids and interfaces, powder technology, textile fibers, etc. Our company's products can be widely used in industries such as cosmetics, mineral processing, papermaking, medical and health care, building materials, ultrafine materials, environmental protection, marine, chemical, petroleum, spraying, paint and ink, printing and dyeing, textiles, integrated optics, LCD displays, etc. The company's customer base not only includes major domestic universities and research institutes, but also a large number of multinational enterprises such as 3M, Foxconn, HOYA Optics, AU Optronics, Samsung Electronics, Philips, as well as listed companies such as Weiyuan Biochemical, Ningxia Oriental, LeKai Film, Rainbow Holdings, etc. Its products are exported to the United States, Japan, South Korea, Malaysia, Thailand, and Hong Kong and Taiwan in China.
The company develops and produces more than 60 professional instruments in eight series, including contact angle measurement, surface tension measurement, Zeta potential measurement, LB membrane interface measurement, single fiber measurement, bundle fiber measurement, fabric measurement, microscopic measurement, and customized testing machines. It has complete independent intellectual property rights for its software and hardware, which can guarantee users' rights to after-sales maintenance, upgrades, and services.
Zhongchen's original English word "powereach" means "strength comes from everyone", reflecting Shanghai Zhongchen's core values and corporate culture of "people-oriented, employees and users are the company's greatest wealth". Meanwhile, "POWEREACH" is also a registered trademark of Shanghai Zhongchen and will become one of the most famous international instrument manufacturer brands.