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Krohne Mass Flow Meter Technology: Micro-Motion Coriolis Calibration for True Fluid Weight
Quick Answer: Krohne mass flow meter technology uses micro-motion Coriolis sensors to measure real fluid mass, not volume. True fluid weight calibration helps plants hit exact batch weights and custody transfer totals. Silver Automation Instruments supplies Coriolis mass flow meters with the same direct mass principle for DN15 to DN200 lines.
Why Micro-Motion Coriolis Calibration Differs From Volume Flow
Volume meters like oval gear or electromagnetic types report flow at process temperature. Mass flow changes when density changes. A Krohne mass flow meter reads the vibrating tube response. Fluid mass passing through the tube creates a phase shift. The transmitter converts that shift into kg/h, g/h or t/h.
This matters in real plants. A food manufacturer in Thailand had batch weight drift of 2.1 percent on coconut milk. The cause was temperature swing from 25 to 42 degrees Celsius. After they switched to a Coriolis mass flow meter with live density compensation, batch weight stayed within 0.4 percent. Silver Instruments calibrated the unit for 0.2 percent liquid accuracy.
True Fluid Weight in Batching, Blending and Custody Transfer
True fluid weight means you measure kilograms, not cubic meters. If you dose 500 kg of palm oil, a volume meter may deliver 512 kg when the product is cold and 488 kg when it is hot. A micro-motion Coriolis meter reads actual mass and stops the valve at the right total.
Krohne mass flow meter technology is often used as a reference in these applications. Silver Instruments supplies compact Coriolis meters for batching systems, tank truck loading and offshore chemical injection. The meter can output 4-20 mA HART plus pulse and Modbus. This direct mass signal works with PLC and DCS systems without extra density inputs.
Silver Instruments Coriolis Mass Flow Meter Options
We supply Coriolis mass flow meters from DN15 to DN200. Process connections include flange, tri-clamp and threaded. Wetted parts are 316L stainless steel or Hastelloy C22. A built-in PT100 sensor handles live density correction for temperature changes. Accuracy is 0.2 percent for liquids and 0.5 percent for gas. Pressure ratings up to 100 bar cover high pressure natural gas and hydrogen pilot lines. ATEX Zone 1 approved housings are available for gas and solvent service.
Common fluids include diesel, crude oil, LPG, molasses, glucose syrup, paint, resin, bitumen and seawater. For abrasive slurry
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Calibration and Field Verification
New meters usually arrive with a factory calibration certificate. Here is the thing: most plants verify new meters with a certificate and forget the on-site check. But field verification against a known weight or master meter will catch installation errors. We recommend a three point check at 10 percent, 50 percent and 90 percent of flow. Use a calibrated scale for liquid weight. Compare the mass total over 10 minutes. If deviation is below 0.5 percent, the meter is healthy.
Silver Instruments can provide third-party calibration certificates from our Nanjing facility. We also support on-site zero calibration. For remote sites in Latin America or Africa, our engineers can guide your team over WhatsApp or Zoom. We have seen zero drift from pipe stress, especially on small DN15 lines. Always isolate the meter and remove pre-tension before zeroing.
FAQ: Krohne Mass Flow Meter Technology and Micro-Motion Calibration
Does a Coriolis mass flow meter measure weight or volume?
It measures mass directly using the Coriolis effect. The transmitter can output kg/h, g/h, t/h or lb/min. If you need volume, the meter calculates volume from live density.
What is the minimum pipe size for a micro-motion Coriolis meter?
Silver Instruments supplies DN15 for low flow from 0.1 kg/h to 1000 kg/h. For micro flow under 0.1 kg/h, twin bent tube designs are available.
Can I use a Coriolis flow meter for oil and gas custody transfer?
Yes if local regulations accept 0.2 percent accuracy and the meter has approved materials. Silver Instruments can supply meters with NIST traceable certificates for diesel, crude and LPG.
How often should calibration be checked?
For most process plants once a year is enough. For custody transfer and food batch systems check every six months. Zero verification takes ten minutes and does not require removing the meter.
What information do you need for a quote?
Send fluid name, flow range in kg/h, pipe size DN, process pressure in bar, temperature in degrees Celsius and required accuracy. We will propose a model and price within one working day.
For technical questions or pricing, contact Silver Automation Instruments at Tel: +86-25-68650347, WhatsApp: +86-25-52155837 or WeChat: +86 15365082610. Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range to get a specific quote.
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