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Quick Answer: Coriolis mass flow meter technology is the preferred metrology hardware for custody transfer because the meter reads mass directly. Direct mass measurement removes volume correction errors caused by temperature, pressure, and fluid density changes. Silver Automation Instruments supplies the SIL-CMF series with plus or minus 0.1 percent mass flow accuracy, density output, pulse output, and 4-20 mA HART for oil, gas, chemical, and food grade batching.
In practice, custody transfer demands more than a good sensor. The meter has to hold calibration in hot crude oil, survive a gas terminal, and give audit-ready pulse counts. That is why Silver Instruments treats the mass flow meter as metrology hardware, not a commodity flow sensor.
Volume shifts with temperature and pressure. A diesel truck loaded at 38 °C can show a different volume at 25 °C. Coriolis mass flow meters skip that correction loop. They measure the mass of the fluid passing through the tubes. The result is kg/h or lb/min, not a temperature-corrected volume estimate.
Silver Instruments sets the SIL-CMF accuracy at plus or minus 0.1 percent of rate for liquids and plus or minus 0.35 percent for gas. Density repeatability is plus or minus 0.0005 g per cubic centimeter. That is enough for LPG, naphtha, fuel oil, solvents, palm oil, and demineralized water batching. The pulse output can be wired to a flow computer or PLC for batch totals.
The meter body uses a twin tube arrangement for stable zero point behavior. The sensor picks up the phase shift caused by Coriolis force. From that signal the transmitter calculates mass flow and density. PT100 temperature measurement is built into the tube wall. This gives you live density and temperature data for custody calculations.
As a mass flow meter manufacturer, Silver Instruments calibrates each SIL-CMF against a traceable master meter. On the output side, you can specify 4-20 mA HART, pulse, and RS485 Modbus at the same time. The pulse output is often set to 0.1 kg or 0.01 kg per pulse for small batching. A flow computer can totalize pulses and match them against a master meter. Calibration certificates traceable to ISO/IEC 17025 can be supplied for the meter and the transmitter.
Most engineers skip this part until a meter fails on site. Custody transfer hardware often sits on a truck loading gantry in coastal heat or a gas terminal with salt spray. The SIL-CMF remote transmitter can be mounted 100 meters from the sensor. The sensor can be supplied with ATEX Zone 1 certification for gas and dust atmospheres. This matters for LPG loading racks and solvent terminals in the Middle East and Southeast Asia.
We have seen customer sites in Malaysia and Vietnam where a turbine meter was replaced after bearing wear. The root cause was dirty fuel and pressure pulsation. A Coriolis meter has no moving parts in the flow stream. So the common mechanical failure point disappears. One less bearing means one less calibration drift source.
For a 2 inch diesel loading arm, the SIL-CMF-DN50 is a common Silver Instruments pairing. It handles about 20,000 kg/h with a compact face-to-face length. For chemical dosing skids, the SIL-CMF-DN15 works well down to 30 kg/h and can detect density changes when a new solvent enters the line. For a 4 inch crude oil or fuel oil pipeline, the SIL-CMF-DN100 gives a wider turndown and a stronger signal in high viscosity flow.
Last year a customer in Vietnam asked us to replace an oval gear meter on a paint thinner loading skid. The old meter needed frequent rotor replacement because the solvent had no lubricity. We specified a SIL-CMF-DN25 with Hastelloy C22 wetted parts and a pulse output. The site now records mass totals directly in the PLC. The calibration interval moved from three months to one year.
Do not send only a product code. Custody transfer quotes need more data. Send the fluid name, viscosity in cP, density range, pipe size in DN, flow range in kg/h, pressure in bar, and process temperature in °C. Also state the hazardous area classification if the meter goes into Zone 1 or Zone 2. This lets us confirm the right sensor size, flange rating, transmitter type, and calibration range.
Because custody transfer meters often need local approvals, tell us the destination country. Silver Instruments ships to Southeast Asia, Oceania, Latin America, Africa, and the Middle East. We can include test reports, pressure test certificates, and third party inspection if required.
The standard SIL-CMF liquid accuracy is plus or minus 0.1 percent of rate. Gas accuracy is plus or minus 0.35 percent of rate. Repeatability is typically plus or minus 0.05 percent. This is suitable for many internal custody transfer and allocation metering systems.
Yes. The meter provides mass flow, volume flow, density, and temperature. The density signal is useful for product quality checks, interface detection between two products, and concentration monitoring in chemical batching.
The standard wetted material is 316L stainless steel. Hastelloy C22 is an option for acids, chlorides, and aggressive solvents. Common fluids include crude oil, diesel, LPG, naphtha, palm oil, glucose syrup, solvents, and demineralized water.
We can supply ATEX Zone 1 certified sensors and transmitters for gas and dust environments. The remote transmitter version allows the electronics to be mounted in a safe area. This is common for truck loading and gas terminal projects.
Standard SIL-CMF DN15 to DN80 meters usually ship in 2 to 3 weeks. Larger DN100 to DN200 meters and Hastelloy C22 versions often need 4 to 6 weeks. Factory calibration and third party inspection add a few days. Send your target delivery date when you request a quote.
Contact Silver Automation Instruments
Tel: +86-25-68650347
Whatsapp: +86-25-52155837
WeChat: +86 15365082610
Website: flow-meter.com.au
Send your pipe size (DN), flow range (kg/h), pressure (bar), temperature (°C), and fluid name. We will come back with a fixed price and a model recommendation for your custody transfer skid.
