Coils for Electromagnetic Flowmeters
Anstee Coil Technology manufactures OEM electromagnetic flowmeter coils (magmeter coils) engineered for pulsed DC and low-frequency AC field excitation across nominal bore sizes from DN15 to DN2000.
We specialise exclusively in electromagnetic coil components for OEM flowmeter production and repair – we do not manufacture or supply complete flowmeter assemblies or electronic transmitters.
We supply customers globally across the industrial process, water management, and chemical sectors, with coils used in applications ranging from small-bore laboratory flow sensors to large-scale municipal water lines. Whether your equipment supports precision dosing or heavy industrial flow measurement, our coils play a critical role in ensuring reliable, accurate magnetic field generation.
Governing Physics & Field Stability
The precision of an electromagnetic flowmeter (magmeter) relies directly on Faraday’s Law of Electromagnetic Induction:
E = B · L · v
Where E is the induced electromotive force (EMF), B is the magnetic flux density, L is the conductor length (pipe diameter), and v is fluid velocity.
Because measurement accuracy hinges on maintaining a uniform magnetic field (B), Anstee Coil engineers symmetrical excitation pairs with strict DC resistance and turn-count tolerances. This minimises thermal drift and zero-point offset during continuous pulsed DC or AC excitation.
Technical Specifications
| Specification Parameter | Standard Capability & Range |
|---|---|
| Flowmeter Diameter Range | DN15 to DN2000 (Matching International Nominal Bore Standards) |
| Coil Configurations | Bespoke Saddle Coils, Bobbin-Mounted Coils, Flat/Symmetrical Pairs, Encapsulated Sensor Assemblies |
| Insulation Ratings | Class F (155°C), Class H (180°C), Ultra-High Temp Class C (200°C+) |
| Excitation Voltage / Frequency | Pulsed DC Excitation, Low-Frequency AC, Dual-Frequency Field Drive Systems |
| Environmental Sealing | Vacuum Pressure Impregnation (VPI), Epoxy Resin Potting, Overmoulded Cable Headers (Up to IP68 Submersible) |
| Hazardous Area Ratings | ATEX & IECEx Intrinsically Safe (Ex i) / Flameproof Encapsulation Options |
| Quality Assurance | 100% DC Resistance Matching, Inductance Verification, Inter-Turn Surge Testing, Hi-Pot Isolation, ISO 9001:2015 |
Electromagnetic Flowmeter Coil Manufacturing
Electromagnetic flowmeters demand coils that perform consistently under a wide range of environmental, electrical, and mechanical conditions. Our coils are engineered to meet these challenges through precise manufacturing and robust design.
We manufacture freestanding, heat-bonded, and bobbin-wound coils in sizes ranging from 2 mm to 3,000 mm diameter, with temperature capabilities of up to 400 °C.
Product Highlights & Technical Benefits
Coil diameters from 2 mm up to 3,000 mm
Short lead times (typically 2 working days for standard products)
Bespoke designs and off-the-shelf electromagnetic flowmeter coils
Manufactured to DN (diamètre nominal) standards
ATEX-compliant coil options available
Bobbin-mounted coil configurations
3D printing capability for rapid prototyping — saving time and cost
Precisely shaped and moulded coils matched to tube radii
Layered windings for optimum electromagnetic performance
Self-bonding magnet wire ensures every turn adheres securely for long-term reliability
100% quality inspection on all manufactured coils
Environmentally friendly curing process
Increased efficiency without long or expensive curing times
Tailored protective packaging to ensure coils arrive in perfect condition
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Designed for Accuracy, Reliability & Long Service Life
Electromagnetic flowmeters demand coils that perform consistently under a wide range of environmental, electrical, and mechanical conditions. Our coils are engineered to meet these challenges through precise manufacturing and robust design.
We manufacture freestanding, heat-bonded, and bobbin-wound coils in sizes ranging from 2 mm to 3,000 mm diameter, with temperature capabilities of up to 400 °C.
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Global Manufacturing & Tri-Region Supply
Anstee Coil Technology supplies electromagnetic flowmeter coils globally, supporting OEM clients across Europe, Asia, North America, and Latin America. We deliver uniform engineering standards, ISO 9001 quality controls, and fast delivery timelines from our manufacturing facilities located in the UK, China, and Mexico.
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Related Capabilities
We also manufacture coils and assemblies for complementary applications, including:
Coriolis flowmeter coils
Self-supporting coils
Electromagnetic coils for industrial applications
Cable assemblies and loom harnesses
Custom sensing devices
Request a Quote for Electromagnetic Flowmeter Coils
If you require coils for electromagnetic flowmeters, whether for prototype development, system validation, or full production supply, our engineering team is ready to support your project.
Contact us to discuss your requirements or request a quote.
Frequently Asked Questions
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Yes. We manufacture custom-formed saddle, flat, and bobbin-wound excitation coils tailored to fit non-standard flow tube diameters, custom sensor housing dimensions, and specialised OEM flowmeter profiles.
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We utilise precision CNC winding machinery and strict turn-count monitoring to ensure symmetrical coil pairs. This guarantees identical resistance and inductance characteristics, producing the balanced, stable magnetic fields required for accurate Faraday flow measurement.
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We offer complete Vacuum Pressure Impregnation (VPI), high-temperature epoxy potting, and custom overmoulding. These processes protect internal copper windings against moisture ingress, vibration, chemical exposure, and thermal cycling.
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Yes. Our engineering team can work directly from original OEM engineering drawings or reverse-engineer physical coil samples from legacy or obsolete flowmeter models.
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Every production batch undergoes 100% electrical inspection, including high-potential (Hi-Pot) testing, DC resistance checks, inductance measurements, and inter-turn surge verification in compliance with ISO 9001:2015 quality standards.
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We accommodate rapid prototyping runs with fast turnaround options (typically within 2 to 5 working days for standard materials), alongside high-volume scheduled batch production managed through our facilities in the UK, China, and Mexico.
Contact Us
UK
E sales@ansteecoil.co.uk
T +44 (0) 1453 708900
CHINA
E sales@ansteecoil.cn
T 0519-89886850
Mexico
E sales@ansteecoil.mx
T +52 81 87480766
Did you know...
One of the biggest advantages of electromagnetic coil flowmeters is that they aren’t mechanical. Freedom from mechanical parts means there's no costly wear. And in turn, a long, reliable, cost-effective service life with minimal maintenance.
