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Mass Flow Meter for Thick Liquid & High Viscosity
Quick Answer: Silver Instruments Coriolis mass flow meters measure thick liquids and high viscosity fluids directly by mass. They handle viscosity up to 100,000 cP without accuracy drift. Pipe sizes range from DN3 to DN150, and you get stable readings even with non-conductive or sticky media.
Why Standard Flow Meters Struggle With High Viscosity
Here is the thing. When fluid viscosity climbs above 500 cP, velocity profiles change inside the pipe. Turbine meters lose linearity. Ultrasonic meters need a clean velocity profile. Electromagnetic meters work only if the liquid is conductive. Positive displacement meters can handle high viscosity but they wear out fast when the liquid carries abrasive particles or changes temperature often. Most engineers skip the theory and go straight to the mass flow meter that does not care about viscosity: the Coriolis meter.
How a Coriolis Mass Flow Meter Solves Thick Liquid Measurement
A Coriolis meter measures mass directly. It uses oscillating tubes. Fluid inertia causes a phase shift. That shift is proportional to mass flow rate. Viscosity, density, and temperature do not change the mass measurement principle. You get mass flow (kg/h or lb/min), density (kg/m³), and temperature (°C) from one device. No need for separate temperature compensation. No Reynolds number corrections. A paint manufacturer in Southeast Asia switched from oval gear meters to our DN25 Coriolis meter for measuring epoxy resin at 80 °C and 15,000 cP. They now have zero mechanical wear and maintenance intervals dropped from monthly to annually.
Typical Applications for High Viscosity Mass Flow Meters
We see these meters in many process industries. A chocolate producer in Brazil uses a DN15 Coriolis meter for cocoa liquor at 8,000 cP. A lubricant blending plant in Nigeria measures base oils at 1,200 cP with DN50 meters. A syrup bottler in Vietnam runs hot sugar syrup at 400 cP through a sanitary DN40 meter with tri-clamp connections. For thick liquids like glue, molasses, and heavy fuel oil, the meter body can be heated with a steam jacket or electrical trace heating. Silver Instruments offers ATEX Zone 1 and Zone 2 certified versions for hazardous areas common in oil and gas downstream or chemical plants in the Middle East.
Key Technical Details You Should Know
Accuracy is often ±0.2% of mass flow rate for liquids. Repeatability reaches ±0.05%. Density measurement accuracy is ±0.5 kg/m³. Viscosity range: 0.5 cP to 100,000 cP. Temperature range from -50 °C to +200 °C. Wetted materials can be 316L stainless steel, Hastelloy C, or PTFE lined for aggressive chemicals. Process connections include threaded, flanged (ANSI, DIN, JIS), tri-clamp, and hygienic fittings. Output signals: 4-20 mA HART, Modbus RTU, pulse, and RS48
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Installation Tips for Thick Liquid Service
Mount the sensor so the tubes stay full at all times. Avoid gas bubbles. For batch loading, install a downstream valve and back pressure regulator to prevent flashing. Use flexible hoses or expansion joints to reduce pipe stress. In dead-end batch applications, the meter can double as a mass batcher. Because thick liquids often solidify when cold, you may need to insulate or heat trace the meter body and adjacent piping. Silver Instruments meters support pipe sizes up to DN150, which covers most high viscosity transfer lines.
FAQ: Mass Flow Meter for Thick Liquid and High Viscosity
1. What viscosity range can Silver Instruments Coriolis meters handle?
We have meters that measure from 0.5 cP up to 100,000 cP. The upper limit is mostly set by the pressure drop inside the tubes. For extreme cases, we review the application with you and suggest a tube geometry that balances accuracy and head loss.
2. Do I need a straight pipe run for high viscosity fluids?
No. Coriolis meters do not need upstream or downstream straight pipe. This makes them easy to retrofit into existing crowded pipe racks.
3. Can the meter handle liquids with suspended solids?
Yes, as long as the solids are not large or sharp enough to damage the tube wall. We have successful installations in wastewater sludge and food paste with particle sizes under 2 mm. Send us details about your solids content and we will advise.
4. What certifications are available for hazardous areas?
Silver Instruments Coriolis meters come with ATEX, IECEx, and often NEPSI certifications for Zone 1 and Zone 2 gas, and Zone 21/22 dust. Remote-mounted transmitters are common for Zone 1.
5. How do I get a price or a quotation for a thick liquid mass flow meter?
Just send us your pressure (bar), temperature (°C), pipe size (DN), flow range (kg/h or t/h), and viscosity (cP) if you know it. Include the process connection type and any hazardous area requirements. Our team in Silver Automation Instruments will reply with a model recommendation, data sheet, and price within one business day.
For more mass flow measurement solutions, see our Coriolis meter selection on flow-meter.com.au or email us at [email protected]. We ship from stock for popular DN15 to DN80 sizes to over 60 countries across Southeast Asia, Oceania, Latin America, Africa, and the Middle East.
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