Flow Meter Technologies for Filling Machines: Magnetic vs Coriolis vs Mass Flow

Modern electronic filling machines measure dose with flow meters rather than fixed-time valves. The meter technology—magnetic, Coriolis or mass-flow—directly affects accuracy, cleanability and cost. For buyers specifying juice, CSD or dairy lines, understanding the difference prevents both over-spending and under-filling complaints.

Executive Summary

Magnetic meters suit conductive liquids (water, juice, CSD) at low cost; Coriolis meters measure true mass flow and handle viscous or non-conductive products with highest accuracy; mass-flow (often Coriolis-based) excels where density varies. Choose by product conductivity, viscosity and required tolerance.

Meter Technology Comparison

Where Each Meter Fits

Magnetic Flow Meters

Standard on juice and CSD fillers; cheap, hygienic, but only works on conductive liquids.

Coriolis / Mass Flow

Used on processing and filling of viscous or variable products (syrup, milk, pulp) where density drift would break a volume meter.

Selection Factors

• Conductivity: non-conductive → Coriolis, not magnetic.
• Viscosity: high → Coriolis mass flow.
• Tolerance: pharma/dairy grade → Coriolis.
• Cost: magnetic is the value choice for water/juice/CSD.

Key Takeaways

• Magnetic = cheap, conductive liquids only.
• Coriolis = highest accuracy, handles viscous/non-conductive.
• Meter choice follows product physics, not budget alone.

Frequently Asked Questions

Is a magnetic meter accurate enough for juice?

Yes for typical ±1% tolerance; choose Coriolis only when pulp, viscosity or tighter tolerance demand it.

Does meter type affect CIP?

Both clean in place, but Coriolis sensors need careful drain design to avoid product hold-up.

Match the meter to your product on a filling machine or Combiblock from Sunswell.