Current position > Product detail
『Refrigerant Flow Meter Accuracy 0.2 Percent: Premium Legal Metrology for Bulk Charging』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
Refrigerant Flow Meter Accuracy 0.2 Percent: Premium Legal Metrology for Bulk Charging
Quick Answer: For bulk refrigerant charging under legal metrology, a 0.2% accuracy mass flow meter is the standard requirement. Silver Instruments supplies Coriolis mass flow meters with ±0.2% rate accuracy, directly measuring mass in kg or tonnes. These meters meet custody transfer rules for R134a, R410A, R32, and other common refrigerants, eliminating volume corrections and temperature compensation.
Why 0.2 Percent Accuracy Matters in Refrigerant Charging
Refrigerant is sold by weight. A bulk charging station filling 1000 kg cylinders needs a meter that is precise within 2 kg at full scale. A 0.5% meter could give you an error of 5 kg per fill, causing revenue loss or overcharge disputes. Most weights and measures authorities demand at least 0.2% accuracy for legal metrology. Silver Instruments Coriolis flow meters achieve this across a wide turndown of 20:1. For example, a DN15 meter handling R410A at 25 bar and 20 °C will measure from 50 kg/h to 1000 kg/h at 0.2% accuracy. The zero stability and density measurement ensure that even when gas bubbles appear during startup, the meter flags the error instead of reporting wrong mass.
Coriolis Meters for Refrigerant: Direct Mass, No Compensation
Many plants still use turbine flow meters with pressure and temperature transmitters to calculate mass. This old method fails when refrigerant changes phase or when density tables are not updated. A Coriolis mass flow meter from Silver Instruments measures mass directly. The meter senses mass flow and density simultaneously through its vibrating tubes. There is no need for external PT100 or pressure transducer for mass calculation. However, the meter still outputs density and temperature values via 4-20 mA HART, Modbus, or pulse for monitoring. The wet parts are 316L stainless steel, compatible with HFCs, HFOs, and blends. For large bulk charging, we offer DN25 to DN80 sizes. For small cylinder filling, DN10 and DN15 work well.
Legal Metrology Approval and Weights & Measures Compliance
In Australia, the NMI requires pattern approval for meters used in trade. In the EU, MID (Measuring Instruments Directive) type approval applies. Silver Instruments Coriolis flow meters have OIML R117 and R137 certifications. In Southeast Asian markets like Thailand, Indonesia, and Vietnam, our meters pass the local Directorate of Metrology verifications. We provide a certificate of accuracy with 5-point calibration traceable to national standards. This paper trail is necessary for audits. A refrigerant distributor in Thailand used our CMF-015 meter to charge bulk tanks. The local weights and measures office verified the installation and approved it for custody transfer within one week. The meter is also ATEX zone 1 and IECEx approved, so it can operate safely in filling areas with flammable refrigerants like R290.
Real-World Example: A Refrigerant Packager in Thailand
Last year, a refrigerant packager in Rayong, Thailand switched from a vertical turbine meter to a Silver Instruments Coriolis flow meter model CMF-015. They fill 50 kg and 100 kg cylinders with R134a and R410A. The turbine m
Installation Tips for Bulk Refrigerant Flow Metering
We have seen on customer sites many times that installation is key. Place the Coriolis meter close to the filling nozzle, not after long vertical pipes. Avoid gas pockets. When charging liquid refrigerant, keep back pressure above the saturation pressure to prevent flashing. Use a 200 mesh strainer before the meter to catch welding debris. The meter does not need straight upstream pipe, but it needs to be supported firmly to reduce vibration. For large DN50 and DN80 meters, use flexible hoses to isolate pump vibration. In practice, most engineers skip the zero calibration after installation because the meter has factory zero. But we recommend you perform a zero check with the pipe full of liquid refrigerant at line temperature once installed. This takes five minutes and improves low-flow accuracy.
Frequently Asked Questions
What is legal metrology for refrigerant bulk charging?
It refers to the measurement of refrigerant mass for commercial transactions between a supplier and a buyer. Governments enforce traceable accuracy limits, normally 0.2% or better.
Why choose a Coriolis meter over a turbine meter for refrigerant?
A turbine meter measures volume, then you need temperature and pressure to calculate mass. This is unreliable when the refrigerant is near the boiling point. Coriolis meters measure mass flow directly, independent of changing fluid properties.
Can the 0.2% accuracy be verified on site?
Yes. Silver Instruments provides a field calibration kit that uses a master meter or a weigh scale. Many customers verify annually with a calibrated platform scale and a test cylinder.
Is the meter approved for trade in my country?
Our Coriolis flow meters carry OIML, MID, and national pattern approvals. We can supply the relevant certificates for your local weights and measures authority if needed. Tell us your country and we will check.
What information do you need for a quotation?
Send us your refrigerant type, operating pressure (bar), temperature (°C), pipe size (DN), and the flow range (kg/h or tonnes per hour). Email [email protected] or use WhatsApp +86-25-52155837. Our engineer will select the right model within 24 hours.
To select the correct Coriolis meter for your refrigerant bulk charging station, email [email protected] with your operating conditions. Include pressure (bar), temperature (°C), pipe size (DN), and required flow range (kg/h). You can also reach us by phone at +86-25-68650347 or on WhatsApp +86-25-52155837. WeChat users add +86 15365082610. Visit our website at flow-meter.com.au for more Coriolis meter specifications.