DN50 Electromagnetic Flow Meter – Accurate Measurement for Conductive Liquids
DN50 (2-inch) is the workhorse of industrial fluid handling. Whether you’re running a water treatment plant, a chemical dosing skid, or a food production line, the DN50 electromagnetic flow meter delivers reliable, maintenance‑free flow measurement without obstructing the pipe. No moving parts. No pressure drop. Just accurate readings day after day.
💡 Quick note: This meter works on Faraday’s law of electromagnetic induction. It requires the liquid to be conductive (≥5 μS/cm). Pure water, oils, and hydrocarbons are not suitable.
Market Outlook – Why You Should Consider a DN50 Mag Meter in 2026
The flow meter market is growing fast. According to multiple industry reports, the global flow meter market was valued at around $11.8 billion in 2026 and is projected to reach $20.8 billion by 2035, growing at a CAGR of 6.5%.
For electromagnetic flow meters specifically, the numbers are even more focused. The global electromagnetic flowmeter market was valued at $3.77 billion in 2024, and is expected to hit $5.33 billion by 2030 – that’s a CAGR of 5.93%. Another report forecasts growth from $3.08 billion in 2025 to $4.38 billion by 2031, at a 6.04% CAGR.
So what’s driving this demand? Two big forces: water and wastewater infrastructure investment (India’s Jal Jeevan Mission, UK’s £104bn water investment) and industrial automation (factories need Modbus, RS485, real‑time data). The DN50 mag meter fits right into that picture.
Who Needs a DN50 Electromagnetic Flow Meter?
The DN50 (2‑inch) size is the sweet spot for mid‑size piping. Here’s where you’ll find it:
💧 Water Treatment Plants
Inlet/outlet metering, filter backwash monitoring, chemical dosing (alum, polymer, chlorine). No clogging.
🧪 Chemical Dosing & Process Control
Acids, alkalis, salt solutions. With PTFE/PFA liners and Hastelloy electrodes, handles corrosive stuff.
🍺 Food & Beverage Production
Sanitary versions for juice, milk, beer, CIP systems. Easy to clean, meets hygiene standards.
🏭 Industrial Cooling Water
Closed‑loop cooling, injection molding, compressors. No pressure drop, lower energy bills.
⛏️ Mining & Slurry
Ore slurries, tailings, thickener underflow. Abrasion‑resistant liner handles particles without wear.
🌡️ HVAC & Building Management
Chilled water, hot water loops. Accurate billing and energy monitoring.
📍 Real‑world example: A municipal water plant using DN50 mag meters on their chemical feed lines reduced maintenance calls by over 70% – because there’s nothing to jam or wear out.
Why Choose Haina’s DN50 Electromagnetic Flow Meter?
You have options. Here’s why engineers pick ours.
✔ No moving parts = low maintenance
No rotors, no turbines. Nothing to jam or recalibrate. Install it and forget it – for years.
✔ Full‑bore design – no pressure drop
Zero obstruction. More flow, less pump work, lower electricity bill.
✔ Works with dirty and corrosive fluids
Solids pass right through. Corrosive? Choose PTFE, PFA, or rubber liners + Hastelloy, titanium electrodes.
✔ Smart communication – RS485, 4‑20mA, HART
4-20mA, pulse, RS485 Modbus RTU, optional HART. Your PLC/SCADA will love it.
✔ Self‑diagnosis and empty‑pipe detection
Monitors electrode coating, coil integrity. Alerts before measurement goes bad.
✔ Built for tough environments
IP65 standard, IP68 optional. Temp from -30°C up to +180°C. Pressure up to 4.0 MPa (PN40).
Technical Specifications – DN50 at a Glance
| Parameter | Value |
|---|---|
| Pipe size (DN) | DN50 (2 inch) |
| Flow rate range | ~3.4 – 68 m³/h (depending on fluid velocity) |
| Accuracy | ±0.5% of reading (±0.2% optional) |
| Repeatability | ±0.1% |
| Conductivity requirement | ≥5 μS/cm |
| Liner materials | PTFE, PFA, Neoprene, Polyurethane, Rubber |
| Electrode materials | 316L SS, Hastelloy C‑276, Titanium, Tantalum, Platinum‑Iridium |
| Output signals | 4‑20mA, Pulse, RS485 (Modbus RTU), HART (optional) |
| Process connection | Flanged (EN, ANSI, JIS), Wafer, Sanitary (Tri‑clamp) |
| Protection class | IP65 (standard), IP68 (optional) |
| Power supply | 220V AC, 24V DC, Battery (optional) |
Installation & Maintenance – What You Should Know
Installation tips:
- Keep 5 pipe diameters of straight pipe upstream and 3 diameters downstream for best accuracy.
- Install with the electrode axis horizontal to prevent bubble entrapment.
- Grounding is critical – especially with plastic pipes. Use grounding rings if your pipe isn’t conductive.
Maintenance:
- Check electrode coating once a year in dirty fluids.
- Verify calibration every 2‑3 years under normal conditions.
- That’s about it.
Related Products & Solutions
📌 Explore more resources to help you select the right flow meter:
👉 Get a DN50 quote – tell us your fluid →
Every application is different. We’ll recommend the right liner, electrode, output, and connection.