Yokogawa's ROTAMASS series represents the evolution of Coriolis flowmeter technology, engineered to deliver high-precision mass flow, density, and temperature measurement for critical industrial processes. As industries increasingly require direct mass-based custody transfer and batching operations, these flowmeters provide a robust solution unaffected by changes in fluid viscosity, density, or flow profile. The series is designed for challenging applications in sectors such as oil and gas, chemical processing, and food and beverage, where measurement stability and reliability are paramount.

Measurement Principle and Technological Advancements

ROTAMASS flowmeters operate on the Coriolis principle, where fluid is directed through one or more oscillating tubes. The mass flow rate is directly proportional to the phase shift or twisting force (Coriolis force) induced in the vibrating tubes. Yokogawa enhances this principle with several key innovations:

• Dual-Tube and Single-Tube Designs: The series includes both dual-tube configurations for standard applications and single, straight-tube designs for fluids with high viscosity or a tendency to solidify, minimizing pressure drop and simplifying cleaning.

• Advanced Signal Processing: Proprietary algorithms and digital filtering techniques compensate for external vibrations and process noise, ensuring stable tube oscillation and measurement integrity even in environments with significant mechanical interference.

• High-Accuracy Performance: The flowmeters achieve mass flow accuracy up to ±0.1% of rate and density accuracy up to ±0.0005 g/cm³, meeting the stringent requirements for fiscal metering and recipe formulation.

Robust Design for Harsh Process Conditions

Constructed to withstand corrosive and abrasive media, ROTAMASS flowmeters feature a range of wetted materials, including stainless steel, Hastelloy C-22, and titanium. The meters are designed for a broad spectrum of operating conditions:

• Wide Pressure and Temperature Ranges: Capable of handling pressures up to 1,000 bar and temperatures from -200°C to +400°C, supporting applications from cryogenic liquids to high-temperature hydrocarbons.

• Hygienic and Sanitary Configurations: Models with 3-A and EHEDG certifications are available for pharmaceutical and food industries, featuring polished surfaces and drainability for clean-in-place (CIP) and steam-in-place (SIP) processes.

• Intrinsic Safety: Explosion-proof and intrinsically safe models certified for ATEX, IECEx, and other international standards enable deployment in hazardous areas.

Integration with Digital Transformation and IIoT

The ROTAMASS series is a cornerstone for Yokogawa's digital transformation initiatives, offering seamless integration with modern control and asset management systems:

• Digital Communication Capabilities: Native support for FOUNDATION Fieldbus, PROFIBUS PA, and Modbus RTU, along with an optional EtherNet/IP module, facilitates real-time data exchange with distributed control systems (DCS).

• Built-in Diagnostics and Predictive Maintenance: The flowmeters continuously monitor device health, detecting issues such as tube coating, erosion, or partial blockages. This data can be accessed via Yokogawa's FieldMate device configuration tool or integrated into plant asset management (PAM) systems for predictive maintenance strategies.

• Density-Based Product Identification: The direct density measurement capability allows for real-time product identification and quality control, such as detecting concentration changes in sugar solutions or monitoring the interface between different products in a pipeline.

Industry-Specific Applications and Value

The versatility of the ROTAMASS series addresses complex measurement challenges across various sectors:

• Oil and Gas: Used for accurate crude oil production allocation, wellhead monitoring, and high-pressure natural gas flow measurement, providing reliable data for fiscal metering even in remote, unmanned locations.

• Chemical Industry: Essential for batching reactive chemicals where precise mass ratio control is critical to product quality and safety. Their ability to handle aggressive solvents and slurries makes them suitable for a wide range of processes.

• Food and Beverage: Employed for measuring high-value ingredients like edible oils, chocolate, and syrups, where recipe accuracy directly impacts cost and consistency. The hygienic designs ensure compliance with strict food safety standards.

Yokogawa's ROTAMASS Coriolis flowmeters combine precision engineering with digital intelligence, offering a future-proof solution for industries seeking to enhance process efficiency, product quality, and operational reliability. Their demonstrated performance in extreme conditions and compatibility with Industry 4.0 frameworks underscore their role as a critical component in modern industrial instrumentation.

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