The Yokogawa ADMAG AXR is the world’s first SIL2-certified 2-wire loop-powered magnetic flow meter, engineered to cut plant wiring infrastructure costs by up to $2,000 per installation point.
2-Wire Loop Powered: Powered directly by DCS I/O card (14.7–35 V DC), slashing power draw by 40%.
Dual Frequency Excitation: Combines zero-point stability with rapid noise-free fluid measurement.
4-Level Adhesion Diagnostics: Predicts electrode coating to prevent unscheduled process downtime.
SIL2 / SIL3 Safety Standard: Perform parameter setup via magnet switches without opening housing covers.
Factory Stock & Fast RFQ: Original Yokogawa supply with 3.1 MTC certificates. Get your 2-hour rapid price quote!
The Yokogawa ADMAG AXR Two-wire Magnetic Flow Meter is engineered for instrument revamps, chemical process engineers, and plant automation specialists who need to eliminate dedicated AC power wiring infrastructure and cut plant electrical CAPEX/OPEX while maintaining ±0.5% flow accuracy in safety-critical loops up to SIL2/SIL3. If you are comparing technologies across different measuring principles, feel free to review our full range of Coriolis Mass Flow Meters and high-accuracy industrial instrumentation options.
| Operating Metric | Standard Factory Specification | Expanded Field Application Limits | Industrial Process & Cost Impact |
| Operating Power System | 2-Wire Loop Powered (14.7 to 35 V DC) | Direct DCS I/O card loop powering | Eliminates dedicated AC power cables; cuts power draw by 40% |
| Nominal Pipe Diameters | DN25 to DN200 (1.0″ to 8.0″) | DN25 to DN100 for explosion-proof types | Fits standard inline process piping for chemical and utility loops |
| Volumetric Accuracy | ±0.5% of rate | Dependent on velocity and nominal size | Prevents mass balance errors in continuous chemical dosing |
| Min. Fluid Conductivity | ≥ 10 µS/cm | Process-dependent threshold limits | Guarantees stable signal lock in chemicals, raw water, and solvents |
| Process Liquid Temp. | -40°C to +130°C (-40°F to +266°F) | PFA mirror-finished liner design | Resists thermal cycling and chemical erosion in CIP flushing loops |
| Excitation Technology | Dual Frequency Excitation | High-density coil alignment | Combines zero-point stability with rapid noise-immune response |
| Safety System Rating | SIL2 Certified (IEC 61508 Standard) | SIL2 single / SIL3 redundant standard | Meets plant functional safety mandates without paid upgrade options |
| Electrode Diagnostics | 4-Level Adhesion Diagnostic | Real-time surface coating monitoring | Enables predictive cleaning before zero-point drift or signal loss |
| Technical Selection Metric | Yokogawa ADMAG AXR (2-Wire EMF) | Standard 4-Wire Magnetic Meter | Industrial Vortex Flowmeter |
| Wiring Infrastructure | 2-Wire Signal + Power Loop | 4-Wire (Separate AC Power + Signal) | 2-Wire Signal + Power Loop |
| AC Power Installation Cost | $0 / Meter (Runs directly on DCS loop) | $1,500 – $3,500 per installation point | $0 / Meter |
| Annual CO2 Footprint | ~1.2 kg CO2 / year | ~60 kg CO2 / year | ~1.5 kg CO2 / year |
| Slurry Noise Immunity | High (Dual Frequency Excitation) | Moderate to High | Fails under solid particle noise |
| Permanent Line Pressure Drop | 0 bar (Full bore non-intrusive) | 0 bar (Full bore) | Moderate drop across bluff body |
| Functional Safety Standards | SIL2 Single / SIL3 Redundant Standard | Varies (Often optional or extra cost) | Varies by manufacturer |
If you have ever tried adding a traditional 4-wire flowmeter to a remote tank farm or hazardous process area, you know the nightmare: running separate 110V/220V AC power conduit, installing extra safety breakers, and applying for hot-work permits just to pull power lines. It easily adds $1,500 to $3,500 per meter in labor and explosion-proof fittings.
The Yokogawa ADMAG AXR eliminates this headache completely. Running entirely on a 2-wire 14.7–35 V DC signal loop powered straight from your existing DCS I/O card, it plugs directly into your 4–20 mA loop. You get a true 0.5% accuracy magmeter with zero additional power infrastructure costs, cutting ongoing instrument power draw by 40% and drastically reducing annual CO2 emissions.
In sticky resin manufacturing, latex emulsion, or wastewater dosing, process media coats the electrode surfaces over time. On standard meters, you only realize the electrodes are fouled when the zero-point drifts so badly that an entire batch of chemical product is ruined.
The ADMAG AXR prevents this with Yokogawa's 4-Level Adhesion Diagnostic Function. The converter continuously monitors the electrical impedance of the electrode surface and alerts your maintenance team via the DCS display before signal breakdown happens. Combined with a mirror-finished PFA liner that prevents media stickiness, you can schedule targeted maintenance during planned downtime rather than reacting to emergency process trips.
Opening a flowmeter's enclosure in dusty, humid, or hazardous Ex-proof environments is a massive safety hazard that usually requires plant shutdown or special safety permits.
The ADMAG AXR features 4 external magnet switches built into the display glass. Operators can configure zero-point calibration, adjust damping, or check diagnostic codes using a magnet wand through the glass. The explosion-proof seal stays 100% intact, protecting sensitive internal electronics from moisture and preserving SIL2 safety integrity loop status. For high-temperature or mass balance applications requiring density integration, see our engineered Micro Motion CMF200M Coriolis Mass Meter options.
Q: How does Dual Frequency Excitation solve slurry noise issues in 2-wire magmeters?
Conventional 2-wire magnetic flowmeters often rely on low-frequency DC excitation to save power, leaving them vulnerable to flow noise caused by slurry particles or low-conductivity fluids. Yokogawa's patented Dual Frequency Excitation combines high-frequency excitation for fast response and slurry noise immunity with low-frequency excitation to guarantee zero-point stability. This delivers 4-wire performance noise immunity in a energy-efficient 2-wire footprint.
Q: Can the Yokogawa ADMAG AXR be installed in hazardous Ex-proof loops without AC power?
Yes. The ADMAG AXR is available in explosion-proof versions for pipe sizes DN25 to DN100 (1.0″ to 4.0″). Operating entirely on a 14.7 to 35 V DC 2-wire loop, it eliminates the need for bulky explosion-proof AC power conduits and junction boxes, simplifying intrinsically safe or flameproof loop design in chemical processing plants.
Q: What electrode materials should I specify for aggressive chemical processing?
The ADMAG AXR offers multiple electrode material options to handle severe process fluids. Available choices include 316L Stainless Steel (JIS SUS316L / EN 1.4404 equivalent), Hastelloy C276 equivalent, Tantalum, and Platinum-Iridium. For aggressive acid or alkali loops, pairing Tantalum or Hastelloy C276 electrodes with the standard mirror-finished PFA lining prevents chemical pitting and extends service life.
Functional Safety Rating: SIL2 Certified (IEC 61508) for single-use loops, SIL3 capable for redundant safety instrumented systems (SIS).
Display Interface: Full-dot matrix LCD with 3-line customizable display supporting English, German, French, Italian, Spanish, and Japanese alarm text.
Wetted Lining Material: High-purity Fluorocarbon PFA with mirror-finished surface to prevent particle adhesion.
Available Lay Lengths & Form Factors: Wafer type (DN25 to DN200) and Flange type (DN25 to DN200) with compact lay lengths.
Engineering Sizing & Velocity Verification: Contact our technical engineers for fluid conductivity reviews, sizing checks (DN25 to DN200), and flow velocity calculations.
Complete Quality Certification Pack: Every ADMAG AXR is supplied with factory calibration sheets, material traceability options, and EN 10204 3.1 Material Test Certificates (MTC).
Direct Price Quote & Global Shipping: Submit your process parameters via our Technical Sales Contact Form today to receive a formal quotation, technical datasheet, and guaranteed delivery schedule within 24 hours.
