Coriolis flow meters for refrigerant charging

The meter measures refrigerant mass in the charging line: the dose is controlled in grams rather than millilitres, so shop temperature, manifold pressure and short flashing episodes do not distort the result. The station controller receives mass data in real time and closes the shut-off valve at the setpoint.

What gets charged is the number of refrigerant molecules — that is, mass. Refrigerant density depends on temperature and batch, so a millilitre dose needs constant corrections and still scatters. A gram is the same in a cold shop and a hot one.

The meter mass channel accuracy is ±0.1% (for liquids) — fractions of a gram even at a micro dose. The overall charging accuracy is the combination of the meter, the shut-off valve and the controller: the meter contributes the smallest term, while valve lag is compensated by the station settings.

Conveyor micro-doses use DN01–DN04: these sizes measure stably from 0.1 kg/h. Supply lines and medium doses use DN08, while higher-capacity stations use DN15–DN25.

Short flashing episodes distort any measurement, so the unit is designed for minimum gas content: a short supply run, liquid-phase pressure maintained downstream, and circuit evacuation before charging. The mass channel needs neither density nor corrections — it counts the mass delivered into the circuit.

Yes. CO₂ stations run at pressures up to ~140 bar, and for them the P execution is available with a working pressure of up to 45 MPa (450 bar) — with a large margin.

R134a, R410A, R32, R404A, R407C and other common refrigerants; for CO₂ (R-744) — with the P execution. Flammable R290 and R600a are handled by meters in Ex versions.

Yes — these are flammable gases, and charging areas fall into zones requiring Ex equipment. Our meters carry Ex db ib / db ia IIC T6 Gb markings and TR CU 012/2011 certification — group IIC covers R290/R600a requirements with margin.

In the liquid-phase supply line: manifold → pneumatic shut-off valve → Mass-EXPERT (DN01–DN04) → cradle hose → charging nozzle → circuit. The compact sensor fits existing modules.

No. The meter measures mass and outputs it over RS-485 (Modbus RTU) or pulse; the dose setpoint and valve control belong to the station controller — no extra flow computer required.

Closing the shut-off valve is the station controller's job: the meter provides mass data in real time over standard interfaces, and the controller closes the valve at the setpoint. This scheme is used on most modern lines and needs no special batching board inside the meter.

Measuring tubes in 316L or Hastelloy: both are resistant to synthetic compressor oils and their mixtures with refrigerants. For a specific medium we recommend agreeing the material via the questionnaire.

Station working pressures — from a few bar up to 140 bar (standard and P executions, the latter to 45 MPa for CO₂). Medium temperature — from −50 to +150 °C; the electronics operate from −60 to +70 °C.

Yes: mass is measured continuously and the data goes to the controller in real time via Modbus or pulse. For short cycles it matters that the setpoint and total reading are implemented in the controller — the standard practice on such lines.

The measuring path has no rubbing pairs or wearing parts: calibration does not degrade over millions of cycles, and the zero point is stable at low flows. In practice, repeatability also depends on valve and controller stability.

The meter is entered in the State Register under No. 98506-26: documented metrology for process and custody applications, verification under MP 98506-26, and a complete document set for quality and metrology departments.

Verification follows MP 98506-26 on a proving rig or on site with reference standards — no shipping the meter away. For a conveyor line this means minimal downtime.

Yes. Dimensions and process connections are matched to the installed meter (Micro Motion LF, Endress+Hauser Promass and others); interface settings are replicated so the station controller needs no rework.

Piping vibration does not introduce error into mass measurement — the meter measures the mass of the flow itself. During installation, the manual guidelines on mounting and line routing are followed: standard practice for dosing sections.

DN01–DN04 sensors take minimal space, need no straight pipe runs and integrate easily into movable cradle modules and robotic carriers — a typical application of the micro sizes.

One meter per charging line. If a station serves two independent circuits or posts, each gets its own meter — the layout is agreed at the design stage.

RS-485 (Modbus RTU) carries mass, dose total, temperature and diagnostics; up to 32 devices share one line. Pulse output, 4–20 mA (HART) and CAN are also available for specific controllers.

19.2–28.8 V DC; consumption is about 20 W. Standard industrial cabinet power supplies work without dedicated converters.

The measuring unit has no wearing parts: maintenance is limited to external inspection and periodic verification. Design service life is 20 years / 100,000 hours.

Warranty is 18 months from delivery or 12 months from installation, whichever expires first. Units supplied as complete assemblies carry the same warranty.

Yes: commissioning, interface setup, verification and service are available across Russia, including remote sites. Engineering support covers everything from selection to controller integration.

The meter with its passport and operation manual, a verification certificate, the approved-type document set, cables and accessories as ordered. For integrators — dimensional drawings and a Modbus register map.

Yes — we assemble metering units for a specific station: sensor, transmitter, piping and cable assemblies. The unit ships tested, with settings matched to your controller.

Yes: the micro sizes are used on charging benches and in climate equipment testing where accurate small doses and documented metrology are required. Special tasks are engineered to your specification.

Send us: the refrigerant, the dose (g), cycle duration, manifold pressure, controller type and preferred interface. An engineer will select the size and execution and prepare a quotation with price and lead time — usually within one business day.