1. Continuous Process Measurement
Provides continuous viscosity information directly from the process, helping operators identify changes between laboratory tests and respond more quickly.
MS-421 Online Process Viscometer
Direct In-Process Moisture Measurement
The MS-421 provides continuous viscosity measurement for selected industrial liquids using vibration-based sensing technology.
Designed for direct installation in pipelines, tanks and process vessels, it provides real-time viscosity data for process monitoring, quality control and operating adjustment.
Core Information
| Detection Target | Typical Applications |
|---|---|
| Viscosity | Process Pipelines · Mixing Tanks · Reactors · Circulation Lines · Process Vessels |
Product Overview
Continuous Viscosity Measurement for Industrial Processes
The MS-421 is an online viscometer for continuous measurement of selected industrial liquids. Installed directly in a pipeline, tank or process vessel, the sensor continuously evaluates changes in the sensing probe’s vibrational damping and related response when interacting with the process liquid.
An application-specific calibration converts the measured response into a viscosity value. Continuous measurement provides faster process information than periodic offline sampling, helping operators identify viscosity changes earlier and improve process consistency. For non-Newtonian fluids, the reported value represents apparent viscosity under the sensor’s measurement and process conditions. Shear behaviour and the laboratory reference method must be considered during application evaluation and calibration.
Suitable Process Media
Suitable for Selected:
Petroleum products and industrial oils
Chemical and polymer liquids
Resins, adhesives and coatings
Paints and inks
Pharmaceutical process liquids
Food and beverage liquids
Selected high-temperature process fluids
Final suitability depends on fluid composition, viscosity range, density variation, temperature, pressure, bubbles, suspended solids, flow conditions, corrosion requirements and installation arrangement.
Heavy, waxy or multiphase petroleum fluids, as well as media containing excessive entrained gas or suspended solids, require separate application evaluation.
Measurement Principle
The sensing probe is maintained in a controlled vibration state while immersed in the process liquid. Interaction with the liquid changes the probe’s vibrational damping and related response. The instrument evaluates this response through an application-specific calibration to provide a continuous viscosity value. Because the vibration response may also be affected by density, temperature and process conditions, applications involving significant changes in composition or density require separate evaluation.
Key Advantages
2. Wide Measurement Range
Supports viscosity measurement across a wide range of selected industrial liquids, subject to fluid characteristics and application calibration.
3. Industrial Sensor Design
The vibration-based sensor has no rotating measurement components, helping reduce mechanical wear. Periodic inspection and cleaning may still be required depending on the fluid’s fouling and buildup tendency.
4. Process Integration
Provides 4–20 mA output and Modbus RTU communication for connection with PLC, DCS and industrial monitoring systems.
Technical Specifications
Available Configurations
1
Configuration1
Standard Configuration: Standard vibration sensor for continuous viscosity measurement in suitable pipelines, tanks and process vessels. The standard configuration uses 316 stainless-steel wetted parts and supports a DN50/PN16 flange connection for suitable low-pressure applications.
2
Configuration2
High-Temperature Configuration: Customized sensor configuration for selected processes operating above the standard temperature range and up to +300°C. Final sensor structure, sealing material, insertion arrangement and process connection depend on the actual operating temperature and process medium.
3
Configuration3
High-Pressure Configuration: Customized configuration for selected high-pressure applications up to 28 MPa. The allowable process pressure depends on the sensor construction, connection rating, sealing arrangement, process temperature and supplied configuration.
4
Configuration4
Explosion-Protected Configuration: Available for selected hazardous-area applications. The enclosure, electrical arrangement and explosion-protection marking must be confirmed according to the certification supplied with the ordered configuration.