AXF Electromagnetic Flow Meter
Yokogawa Electric's electromagnetic flow meters have a long history of over half a century.
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Yokogawa flow meter
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Detailed introduction
Here’s a rundown of the key features that made the Yokogawa AXF Electromagnetic Flow Meter a standout in its class:
Enhanced Dual Frequency Excitation: Improves stability and noise immunity, especially in slurry or low-conductivity applications.
Electrode Adhesion Diagnostics: Continuously monitors for insulating buildup on electrodes and alerts users before performance is affected.
Replaceable Electrodes: Optional design allows for easier maintenance and cleaning.
Infrared Switches: Enable parameter setting without opening the case—ideal for hazardous or clean environments.
Large Backlit LCD: Displays up to three lines of information, including bar graphs and alarm messages.
Flexible Installation: Converter or terminal box can be rotated to match site wiring needs.
High Accuracy: Standard accuracy of 0.35% of reading, with an optional 0.2% high-accuracy calibration.
Fast Pulse Output: Supports up to 10,000 pulses per second for high-speed batching.
Minimum Conductivity: Capable of measuring fluids with conductivity as low as 1 µS/cm.
“Easy Setup” Menu: Frequently used parameters are grouped for quick access.
| Parameter | Specification / Option |
|---|---|
| Size Range | 2.5 mm to 400 mm (flanged types) |
| Accuracy | ±0.35% of reading (standard), ±0.2% (optional high accuracy) |
| Minimum Conductivity | 1 µS/cm |
| Process Temperature | -10°C to +180°C (depending on liner and electrode material) |
| Process Pressure | Up to 4 MPa (varies by size and flange rating) |
| Liner Materials | PTFE, PFA, Hard Rubber, Urethane Rubber |
| Electrode Materials | SUS316L, Hastelloy C, Tantalum, Titanium, Platinum |
| Power Supply | 100–240 V AC or 24 V DC |
| Output Signals | 4–20 mA DC, pulse, status, alarm |
| Communication Protocols | HART, BRAIN, Modbus, FOUNDATION Fieldbus, PROFIBUS PA |
| Ingress Protection | IP66/IP67 |
| Display | Large backlit LCD, 3-line display with bar graph and messages |
| Parameter Setting | Infrared switches (no need to open case) |
| Self-Diagnostics | Electrode adhesion detection, empty pipe detection |
❓ Frequently Asked Questions – AXF Electromagnetic Flow Meter
1. What is the minimum conductivity required for accurate measurement?
The AXF can measure fluids with conductivity as low as 1 µS/cm, making it suitable for a wide range of applications including ultra-pure water.
2. What happens if the flowmeter is transported but not installed immediately?
If the AXF is moved to the installation site and left uninstalled, rainwater or environmental exposure may impair performance. It’s recommended to install and wire it promptly after transfer.
3. Can the electrodes be cleaned or replaced?
Yes, replaceable electrodes are available for general-purpose types. They can be removed, cleaned, and reinstalled without dismantling the entire unit.
4. How is parameter setting done in hazardous areas?
The AXF features infrared switches, allowing users to configure settings without opening the case—ideal for hazardous or clean environments.
5. What communication protocols are supported?
It supports HART, BRAIN, Modbus, FOUNDATION Fieldbus, and PROFIBUS PA, ensuring compatibility with most industrial systems.
6. Is the AXF still available?
The AXF series was discontinued in June 2022, but many units are still in operation, and Yokogawa offers successors like the ADMAG AXG and AXW series.
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