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Mass Flow Meter Coriolis: High-Precision Multi-Variable Monitoring
Quick Answer: A Coriolis mass flow meter directly measures mass flow, density, and temperature from a single sensor. This removes the need for separate density meters and temperature transmitters. Silver Instruments supplies Coriolis meters from DN01 to DN150 with mass flow accuracy up to ±0.1% of rate, ideal for custody transfer, chemical dosing, and high-viscosity fluids.
What Makes a Coriolis Meter a Multi-Variable Device?
A Coriolis flow meter uses the Coriolis effect on vibrating tubes. The phase shift between inlet and outlet gives mass flow. The natural frequency of the tube gives fluid density. A built-in platinum resistance thermometer (PT1000) measures temperature. So one instrument outputs three process variables simultaneously. Common outputs are 4-20 mA HART, pulse, and RS485 Modbus. Engineers can monitor mass flow in kg/h, density in g/cm³, and temperature in °C on a single transmitter display. Silver Instruments CMF series transmitters include a local LCD for real-time multi-variable monitoring.
Where High-Precision Multi-Variable Monitoring Matters
Oil and gas operators use Coriolis meters for custody transfer because mass flow is independent of pressure and temperature. A terminal in Malaysia replaced turbine meters with Silver Instruments DN80 Coriolis meters to measure diesel and gasoline. They now get net mass and density at the same time, eliminating manual sampling. In the chemical sector, a paint factory in Vietnam installed a DN25 Coriolis meter to dose resin and solvent. The meter tracks density changes, allowing the PLC to adjust the mix ratio on the fly. Food and beverage plants measure Brix and concentration in syrup lines using the density output. A dairy in Australia uses a DN15 meter to measure chocolate mass flow and verify recipe density inline. These applications are tough because fluids range from 1 cP to 20,000 cP. A Coriolis meter handles that span without recalibration.
Technical Details Engineers Ask About
Silver Instruments offers Coriolis meters in sizes from DN01 to DN150. Typical flow ranges: DN15 handles 0 to 500 kg/h for liquids; DN50 handles 0 to 30,000 kg/h; DN100 goes up to 150,000 kg/h. Mass flow accuracy for liquids is ±0.1% of rate or ±0.15% depending on the calibration option. Gas mass flow accuracy is ±0.5% of rate. Density accuracy is ±0.0005 g/cm³. Temperature accuracy is ±0.2 °C using PT1000. The wetted parts are 316L stainless steel, with Hastelloy C22 available for corrosive chemicals. Process connections include tri-clamp, DIN flange, ANSI flange, and threaded options. The transmitter supports 4-20 mA HART, RS485 Modbus RTU, and pulse outputs. Certifications include ATEX Zone 1, IECEx, and SIL2 for safety instrumented systems. Measuring tube design is dual U-shape or micro-bend for low pressure drop. For high viscosity liquids abov
Installation Tips from Field Experience
Most engineers skip this part. A Coriolis meter does not need upstream or downstream straight pipe runs. You can mount it directly after a pump or elbow. But you must avoid pipe vibration that matches the sensor frequency. We have seen this on customer sites many times: a stiff pipe support near the meter fixes noisy density readings. For fluids that can coat or crystallize, steam trace the meter body. Our CMF series allows purging and cleaning in place (CIP). If you measure high-solids slurry, install the meter in a vertical pipe with flow going upward to prevent settling during zero flow.
Frequently Asked Questions
Here are the five most common questions we get from plant engineers and system integrators.
Can a Coriolis meter measure density and calculate concentration?
Yes. The meter outputs live density. The transmitter or a flow computer can convert density to concentration units like °Brix, °Baumé, or percent solids. We pre-configure the concentration matrix for common fluids such as sucrose, sodium hydroxide, and ethanol-water mixtures.
What is the typical turndown ratio for mass flow?
A Silver Instruments Coriolis mass flow meter has a turndown of up to 20:1 or even 50:1 depending on the calibration. This means a DN25 meter can measure from 20 kg/h up to 1,000 kg/h with the stated accuracy. For low flow, we supply DN01 and DN03 sizes with flow rates as low as 0.4 kg/h.
Does the meter require temperature and pressure compensation for mass flow?
No. Mass flow measurement is direct. You do not need external pressure or temperature transmitters. This is a big advantage over volumetric meters like turbine or vortex, which need density input for mass calculation.
Can I use a Coriolis meter for batching or dosing?
Absolutely. The meter has a fast response time, typically 5 ms to 50 ms. The pulse output or Modbus register makes it easy to integrate with PLC and DCS. Many chemical and food plants use our CMF meters as master batch controllers.
What is the lead time and price for a DN25 Coriolis mass flow meter?
We keep standard DN15, DN25, and DN50 meters in stock for quick shipment. Price depends on material, approvals, and transmitter type. Send us your flow medium, viscosity in cP, operating pressure (bar), temperature (°C), pipe size (DN), and flow range. Our email is [email protected], telephone is +86-135-1213-1526, and WhatsApp is 86-135-12131526. We usually provide a quote within 24 hours.
Silver Automation Instruments supplies industrial Coriolis mass flow meters to end users and distributors in Southeast Asia, Oceania, Latin America, Africa, and the Middle East. Contact us today for a price quote or to request a datasheet.
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