Yokogawa ADMAG AXG Magnetic Flowmeter
Overview: Total Insight Built Into Every Measurement
The Yokogawa ADMAG AXG is a high-quality, highly reliable magnetic flowmeter developed on decades of field-proven experience, enhanced by Yokogawa’s proprietary dual-frequency excitation method for stable, accurate measurement even under difficult process noise conditions. As part of Yokogawa’s ADMAG Total Insight (TI) concept, the AXG features enhanced settings for customized setups, pre-defined trend views, and multiple configuration sets accessible through a micro SD card, with built-in verification functionality that reduces total cost of ownership.
As an authorized supplier of Yokogawa flow instrumentation, Seven Star LLC sources and supplies the ADMAG AXG magnetic flowmeter to oil and gas, chemical, and water treatment facilities across Oman and the wider GCC. Because the AXG’s Total Insight diagnostic and communication features scale across a wide range of application-specific options, Seven Star LLC helps engineering teams configure the correct sensor, transmitter, and protocol combination for each measurement point.
Measurement Principle
The AXG measures flow via Faraday’s law of electromagnetic induction, with Yokogawa’s dual-frequency excitation method combining traditional high- and low-frequency excitation approaches to ensure greater stability and quicker response even when line noise or other disturbances are present. This is particularly valuable in severe applications such as aluminum slurry flow, pulp stock to a digester blow tank, or brine and caustic measurement in chlor-alkali electrolyzer cells, where a conventional single-frequency magmeter would struggle with signal stability.
Application Diagnostic functionality actively utilizes flow noise to detect specific process conditions, including gas bubble contamination, electrode corrosion, low conductivity, and slurry noise, categorizing findings into alarm states (persistent abnormal conditions) or warning states (early signs of abnormality) so operators can distinguish between an immediate problem and a developing trend. A total of 28 system and process alarms can be individually classified according to NAMUR NE107, letting each alarm be adapted to specific process requirements rather than generating unnecessary distraction for plant operators.
Engineering Design of the ADMAG AXG
The AXG flow sensor covers diameters from 0.1 to 20 inch (2.5 to 500 mm) with ceramic or PFA liner options, delivering standard accuracy of ±0.3% of rate, or high accuracy of ±0.15% of rate on sizes 1 to 8 inch (25-200mm). Explosion-proof versions are available from 0.1 to 16 inch (2.5-400mm), submersible versions from 0.5 to 20 inch (15-500mm), and hygienic versions from 0.5 to 5 inch (15-125mm), giving specifiers a version matched to nearly any installation environment or process media.
Built-in verification checks the magnetic circuit, excitation circuit, computing circuit, alarm history, and cable connection, with built-in and standard verification accurate within ±5% of factory accuracy, and enhanced verification (using peripheral devices) accurate within ±2%. Backward compatibility with the AXG4A converter allows integration with older flow sensors and existing signal/excitation cables, and worldwide approvals including explosion-proof, SIL, EMC, and NAMUR support deployment across diverse regulatory environments. The AXG is also certified NSF61 for drinking water applications and carries SIL2 certification (simplex) or SIL3 (redundant configuration) per IEC 61508.
Key Features
The Yokogawa ADMAG AXG Magnetic Flowmeter delivers accurate, richly diagnosable flow measurement. Key characteristics include:
- Dual-frequency excitation method for stable measurement under high process noise.
- Diameter range 0.1 to 20 inch (2.5 to 500 mm); accuracy up to ±0.15% of rate.
- SIL2 (simplex) / SIL3 (redundant) certification per IEC 61508; NSF61 drinking water approval.
- Application Diagnostic detecting gas bubbles, electrode corrosion, low conductivity, and slurry noise.
- Built-in, standard, and enhanced verification functions for reduced total cost of ownership.
- Explosion-proof, submersible, and hygienic versions available across the size range.
- Multiple communication protocols including EtherNet/IP, HART, Modbus, PROFIBUS PA, FOUNDATION Fieldbus.
Wetted Materials and Process Compatibility
Specifying a magnetic flowmeter correctly is largely a question of matching the wetted parts to the process chemistry, and the Yokogawa ADMAG AXG offers an unusually broad electrode palette for that purpose. Electrodes are available in stainless steel 316L and 329J4L, platinum-iridium, nickel alloy (UNS N10276), tantalum, and titanium, which between them cover everything from potable water and general utility duty to hot caustic, seawater, and strongly oxidising acids. PFA and ceramic liners are offered against the same size range, with PFA-lined sensors rated for process temperatures up to 180°C in the appropriate application configuration. Minimum fluid conductivity is typically in the region of 1 to 3 µS/cm depending on sensor size and configuration, so hydrocarbon service remains outside the scope of the technology and should be referred to Coriolis or ultrasonic alternatives.
On the mechanical side, the sensor is supplied to ASME Class 150 and Class 300, EN PN10/PN16/PN25, JIS and JPI flange standards, with maximum working pressure following the flange rating and size – up to 3.0 MPa on ASME Class 150 and 6.0 MPa on Class 300 in the relevant sizes. Stainless steel 316L grounding rings, in either single or dual metal-hat arrangements, establish the reference potential needed for a clean signal when the meter is installed in lined or plastic pipework. The housing carries an IP66/IP67 and Type 4X rating and an ambient range of −40 to 60°C, with vibration immunity tested to 34.3 m/s² rms over 5 to 2000 Hz per IEC 60068-2-64 – a combination well matched to outdoor pipe racks and pump-adjacent installations across Oman and the GCC, where summer ambient temperatures and mechanical vibration together defeat lesser instruments.
Industrial Applications
The ADMAG AXG is deployed across oil and gas, chemical, pulp and paper, food and beverage, metal and mining, and water and wastewater applications, including chlor-alkali electrolysis, digester blow lines, CIP (clean-in-place) processes, and drinking water systems where NSF61 approval is required. Its dual-frequency excitation and Application Diagnostic functions make it particularly well suited to abrasive slurries and other severe process conditions that challenge conventional magmeters.
Seven Star LLC supports oil and gas operators, chemical plants, and water treatment facilities across Oman, Muscat, Sohar, and the broader GCC region with sourcing of Yokogawa ADMAG AXG flowmeters, helping projects achieve reliable, diagnosable flow measurement across demanding applications.
Technical Specifications
The table below summarizes the core specifications of the Yokogawa ADMAG AXG Magnetic Flowmeter as supplied by Seven Star LLC.
| Parameter | Specification |
|---|---|
| Model | Yokogawa ADMAG AXG (Total Insight Series) |
| Diameter Range | 0.1 to 20 inch (2.5 to 500 mm) |
| Liner Materials | Ceramic, PFA |
| Accuracy | ±0.3% of rate standard; ±0.15% high accuracy (1-8 in.) |
| Safety Certification | SIL2 (simplex) / SIL3 (redundant) per IEC 61508 |
| Drinking Water Approval | NSF61 |
| Communication Protocols | EtherNet/IP, BRAIN, HART, Modbus, PROFIBUS PA, FOUNDATION Fieldbus |
| Explosion Protection | FM, ATEX, IECEx (AXG4A transmitter) |
| Data Logging | Micro SD card, up to 4 process variables |
Request a Quote for Yokogawa ADMAG AXG Magnetic Flowmeter
Seven Star LLC supplies the Yokogawa ADMAG AXG magnetic flowmeter with full manufacturer documentation and regional technical support. Contact our instrumentation division for a formal B2B quotation, to confirm the correct sensor size, liner, and transmitter configuration for your application, or to obtain the complete technical datasheet. Seven Star LLC ensures every unit shipped across Oman and the GCC is genuine Yokogawa hardware, correctly specified, and backed by local support.
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Yokogawa is a global Japanese leader in process automation, industrial instrumentation and control systems, with more than a century of engineering expertise. The company designs and manufactures a comprehensive portfolio including distributed control systems (DCS), safety instrumented systems (SIS), field instruments, analyzers, recorders and industrial software platforms used to monitor, control and optimize complex industrial processes.
Yokogawa solutions are widely deployed in oil & gas production and refining, petrochemical plants, power generation facilities, chemical processing, pharmaceuticals, water & wastewater treatment and advanced manufacturing industries. Its instrumentation portfolio covers pressure, flow, level and temperature measurement, alongside advanced process analyzers for gas and liquid analysis.
Known for high reliability, measurement accuracy and long-term stability, Yokogawa systems are engineered for continuous operation in mission-critical environments. With strong capabilities in digitalization, lifecycle management and plant safety, Yokogawa supports operational efficiency, process safety and sustainable industrial performance across global industrial infrastructures.
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