Coaxial Cylinder Viscometer

Advanced Coaxial Cylinder Viscometers – Superior Performance for High-Shear Testing & Complex Fluid Analysis.

Industry Expertise

Years of experience in viscometer manufacturing and deep industry knowledge

High-Quality Products

Precision-engineered viscometers that meet the highest standards

Comprehensive Services

From product selection to after-sales support, we offer one-stop solutions

Proven Reliability

Widely trusted by leading companies across multiple industries

Explore Our Products

Browse our core Coaxial Cylinder Viscometer series and find the ideal solution for your application needs.

About Martests

As a trusted Chinese exporter of rotational viscometers, we focus on helping your business succeed with reliable quality, responsive service, and tailored solutions.

Partner with us to bring precision and performance to your lab or production line.

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Product Features

One-stop Accessories Solutions

Unlock more testing possibilities with our professional accessories – designed to expand your viscometer’s capabilities.

Temperature Probe

Delivers precise, real-time temperature monitoring for consistent viscosity measurements across all testing conditions and sample types.

Spindle Rack

Provides secure storage for delicate spindles, extending lifespan and maintaining calibration accuracy.

Ultra-Low Adapter

The must-have companion for precise measurements when testing ultra-low viscosity fluids below 15 cP - ensures reliable, repeatable results.

Micro Printer

Turn your test results into instant documentation. Our compact thermal printer delivers clear, accurate viscosity reports - exactly when you need them.

Thermosel System

Control precise sample temperatures up to 300°C. Perfect for testing hot melts, waxes, and polymers that require elevated temperatures.

Water Baths

Precise, stable, disturbance-free temperature control for your viscosity testing needs, ensuring flawless laboratory results.

Small Sample Adapter

Specially designed for testing small volumes of expensive or limited samples while maintaining high accuracy and reproducibility of measurements.

Standard Viscosity Fluid

Precisely calibrated reference fluids ensuring your viscometer delivers consistently accurate measurements across all testing ranges.

Model Selection Step

Learn how to choose the right model and configuration based on your sample characteristics and testing needs.

Define the Measurement Range

Identify the viscosity range of your samples to select the appropriate viscometer type (low, medium, or high viscosity).

Consider Temperature Control

Assess whether temperature control is required to ensure stable and accurate viscosity measurements.

Decide on Accessory Requirements

Determine if accessories are needed based on sample volume, viscosity level, or special testing conditions.

Plan for Standard Calibration

Include standard fluids in your setup to check instrument performance regularly and maintain accuracy.

Choose Based on Application Purpose

Select a model suited to your use case, such as routine QC, R&D, or data alignment with suppliers.

Various Industrial Applications

Achieve accurate, repeatable results by maintaining precise temperature conditions during viscosity and surface tension testing.

Food & Beverage

Guarantee desired texture and stability in your food and beverage products by accurately controlling viscosity throughout development and production.

Pharmaceuticals

Achieve precise formulation and consistent drug delivery by meticulously controlling the viscosity of pharmaceutical liquids and semi-solids.

Cosmetics

Develop luxurious textures and ensure product stability for your cosmetic formulations by precisely measuring and controlling viscosity.

Paints & Coatings

Precisely measure and control viscosity to ensure superior product consistency, optimal application, and desired finish for your paints and coatings.

Petrochemicals & Lubricants

Optimize performance and ensure quality by precisely measuring the viscosity of your petrochemicals and lubricants, critical for process control and product classification.

Adhesives

Achieve optimal bonding strength and consistent application by precisely controlling the viscosity of your adhesives, crucial for reliable product performance.

Chemical Manufacturing

Ensure consistent product quality and optimized processes by precisely monitoring and controlling the viscosity of your diverse chemical formulations.

Pulp & Printing

Maintain optimal print quality and efficient paper production by precisely controlling the viscosity of inks, coatings, and pulp slurries.

Knowledge of Coaxial Cylinder Viscometers

Discover the world of Coaxial Cylinder Viscometers: Uncover their defining characteristics, explore the advantages they offer, and learn about their diverse applications.

What is a Coaxial Cylinder Viscometer?

A coaxial cylinder viscometer (also known as a Couette viscometer) is an instrument designed to measure the viscosity of liquids by analyzing how they resist flow between two concentric cylinders. The setup consists of a stationary outer cylinder (the cup) and a rotating inner cylinder (the bob). The liquid sample fills the narrow gap between these two cylinders.

When the inner cylinder rotates, the fluid in the gap is sheared. The viscometer measures the torque required to keep the cylinder in motion, and from this resistance, the viscosity of the liquid is calculated. Because the geometry is well defined, the shear rate distribution in the fluid can be precisely determined, making this design particularly suitable for studying both Newtonian and non-Newtonian fluids.

What are the Advantages?

High Precision Measurement: Rotational viscometers provide highly accurate viscosity readings, essential for detailed analysis and quality control in various industries.
Versatile Usage: These instruments are suitable for measuring a wide range of fluids, making them adaptable for different industrial and laboratory applications.
Real-time Data Output: With the ability to deliver instantaneous viscosity results, these devices facilitate efficient processing and decision-making.
Consistent and Reliable: Rotational viscometers offer repeatable measurements, ensuring reliable data for continuous operational excellence.

What are the applications?

Research and Development: Utilized in R&D, these instruments help in evaluating the rheological properties of new formulations, aiding in the development of innovative products.
Pharmaceuticals: In the pharmaceutical industry, rotational viscometers determine the viscosity of syrups, gels, and ointments, which is vital for ensuring correct dosage and efficacy.
Petrochemical Industry: These devices are used to measure the viscosity of lubricants and oils, critical for performance evaluation and formulation adjustments in petrochemical processes.
Adhesives and Coatings: By assessing the flow properties of paints, coatings, and adhesives, rotational viscometers assist in maintaining product consistency and application performance.

Effectively Manage Quality Issues

Learn how we address rework and returns to maintain the highest quality standards and ensure customer satisfaction.

Reasons for Rework

Reasons for Replacement

Client Feedback & Reviews

Discover what our clients have to say about their experience with our products and services.

"Martests provided us with exceptional viscometers that have significantly improved the accuracy of our lab results. Their customization services for branding were also exemplary!"

"We have been sourcing viscometers from Martests for years, and their product quality has never disappointed. Excellent customer service and prompt delivery are additional perks!"

"As a company specializing in lab instruments, partnering with Martests has been a game-changer. Their viscometers are reliable and competitively priced, making them a valuable supplier for our business."

FAQs for Coaxial Cylinder Viscometers

What makes a coaxial cylinder viscometer a unique tool?

A coaxial cylinder viscometer is unique because its enclosed “cup and bob” design creates a large, defined shear area. This makes it extremely sensitive for low-viscosity fluids and prevents evaporation of volatile samples, providing highly accurate, absolute viscosity measurements.

Why is it the best choice for low-viscosity fluids?

Its design creates a large surface area where the fluid contacts the bob. This amplifies the tiny rotational resistance (torque) from thin fluids, turning a weak signal into a strong, measurable, and repeatable reading for accurate results.

Should my customer choose a DIN or ISO system?

The choice depends on the industry standard your customer must follow. DIN systems are often required in the European paint and coatings industry. ISO is a more general, global standard. The difference is the specific dimensions of the cup and bob.

Is a coaxial cylinder system suitable for samples with particles?

A coaxial cylinder viscometer is suitable for particle-containing samples, but only if the particle size is small relative to the gap between the cylinders.