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Yokogawa Flow Meter Solutions: Rotameter and Magnetic Flow Meters for Industrial Processes
Quick Answer: Yokogawa offers two distinct flow measurement technologies for industrial use. Their rotameter (variable area flow meter) provides local indication without power, ideal for purge applications and low-flow gas or liquid measurement. Their magnetic flow meters handle conductive liquids with high accuracy, suitable for water, chemical, and hygienic processes. Silver Automation Instruments supplies both Yokogawa original meters and cost-effective alternatives with fast delivery across Southeast Asia, the Middle East, Africa, and Latin America.
What Is a Yokogawa Rotameter and How It Works
A Yokogawa rotameter is a variable area flow meter with a tapered glass or metal tube and a float inside. The float rises when fluid flows upward. You read the flow rate where the top edge of the float aligns with the scale on the tube. No external power supply is needed. The device operates purely on fluid momentum and gravity.
Many plants in Thailand and Indonesia still use RAKD series metal tube rotameters for nitrogen blanketing lines. These units handle flows as low as 0.5 L/h of gas. Yokogawa built them with 4-20 mA HART output options and ATEX Zone 1 certification for refinery environments. The float material can be stainless steel, PTFE, or Hastelloy, depending on your process fluid.
Silver Automation Instruments stocks several Yokogawa rotameter models for immediate shipment. If your application needs a cheaper alternative, we also offer our own metal tube rotameter with identical mounting dimensions. Send us your flow range in kg/h or L/min, process temperature in °C, and connection size DN15 to DN100.
Yokogawa Magnetic Flow Meter Technology
Yokogawa magnetic flow meters use a dual-frequency excitation method. This reduces noise from slurries and low-conductivity fluids down to 1 µS/cm. Unlike many competitors, Yokogawa ADMAG series meters can measure even with electrode coating. The technology helps in wastewater plants that add lime or polymer. In a desalination plant in Saudi Arabia, a Yokogawa AXF magnetic flow meter measured brine flow at 1200 m³/h with 0.2% accuracy for over three years without re-calibration.
The electronics are housed in IP67 or IP68 enclosures. For offshore platforms, Yokogawa offers submersible sensors in titanium and tantalum. These sensors survive seawater corrosion and accidental flooding. The liner is PFA or polyurethane, thickness from 3 mm, protecting against abrasive solids up to 10% concentration.
Common pipe sizes range from DN2.5 for chemical dosing to DN2000 for main water distribution. Yokogawa magnetic flow meters output 4-20 mA HART, Modbus, or Foundation Fieldbus. We at Silver Instruments typically configure the pulse output for batch control in food and beverage plants. A brewery in Mexico used our setup for filling tanks of beer with ±0.5% repeatability.
When Engineers Choose Rotameter vs Magnetic Flow Meter
In practice, most engineers skip comparing these two technologies directly because they solve different problems. A rotameter works best for clean, low-flow str
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A magnetic flow meter is the choice when you need high turndown ratio and remote transmission. A chemical plant in Brazil measured hydrochloric acid with a Yokogawa magmeter lined with PFA and Hastelloy C electrodes. The flow range was 0 to 30 m³/h on DN50 pipe. They integrated the meter into a DCS via Modbus.
Because both types have niche advantages, Silver Automation Instruments recommends you share specific details. Give us your fluid name, conductivity if it is for a magmeter, viscosity in cP if it is for a rotameter, and pipe size. We help you pick the right Yokogawa model or a direct substitute that fits your budget.
Silver Automation Instruments Supply and Support
We ship Yokogawa flow meters from stock to Australia, Vietnam, Nigeria, Chile, and the UAE. Our technical team programs the transmitter for your engineering units before dispatch. You receive a meter ready to wire and power up. Typical lead time for stock models is 5 working days. For large quantities above 20 units, we can deliver within 3 weeks by air freight.
If you need a magnetic flow meter for seawater cooling lines, we also supply our own brand with titanium electrodes and neoprene liner. The price is roughly 40-50% lower than Yokogawa, while meeting ISO 4064 Class 1 accuracy. A customer in Oman replaced 12 aging Yokogawa units with our meters and reduced cost by USD 18,000 in one project.
Contact Silver Automation Instruments today:
Email: [email protected]
Tel: +86-25-68650347
WhatsApp: +86-25-52155837
WeChat: +86 15365082610
Tell us your pressure in bar, temperature in °C, pipe size DN, and flow range. We will reply with a model recommendation and a formal quotation within 24 hours.
Frequently Asked Questions
Can a Yokogawa rotameter measure dirty water?
No. Suspended solids can stick to the float and tube wall, causing the float to jam. Use a magnetic flow meter for dirty water above 1% solids.
What is the minimum conductivity for a Yokogawa magmeter?
The standard minimum is 5 µS/cm. Some models with dual-frequency excitation can go down to 1 µS/cm. For deionized water below 1 µS/cm, switch to a Coriolis meter.
Does Silver Automation Instruments calibrate Yokogawa meters before shipping?
Yes. We perform a 5-point wet calibration on every magnetic flow meter on our accredited rig. You get a certificate traceable to NIST standards.
Can you supply hazardous area versions?
Yes. We supply Yokogawa magmeters with ATEX, IECEx, and EAC Ex certifications for Zone 1 and Zone 2. Rotameters are available with Ex ia proximity switches.
What is the typical lead time for a DN150 Yokogawa magnetic flow meter?
If we hold stock in our Singapore hub, 3 to 5 days. Special lining or electrode materials add 4 to 6 weeks. Confirm with our sales team for real-time availability.