Volumetric and Mass Flow Measurement
Accurate measurement of standard volumetric flow, actual volumetric flow, and mass flow in a single device – without the need for additional corrections.
CS Instruments – VU 570
Independent of gas composition, with integrated pressure and temperature compensation – for measuring volumetric and mass flow.
| Measured Medium: Air, non-aggressive gases, mixed gases (non-condensing) |
| Measurement Principle: Vortex-ultrasonic (vortex frequency measurement) |
| Accuracy: ±1.5% of measured value (optional ±1%) |
| Process Pressure: Up to 40 bar |
| Process Temperature: -40 to +100 °C |
| Protection Class: IP67 |
| Measured Medium: Air, non-aggressive gases, mixed gases (non-condensing) |
| Measurement Principle: Vortex-ultrasonic (vortex frequency measurement) |
| Accuracy: ±1.5% of measured value (optional ±1%) |
| Process Pressure: Up to 40 bar |
| Process Temperature: -40 to +100 °C |
| Protection Class: IP67 |
- Vortex-Ultrasonic Measuring PrincipleFlow measurement based on vortex frequency with ultrasonic detection, without moving parts and without wear.
- Integrated Pressure and Temperature CompensationBuilt-in pressure and temperature sensors enable accurate measurement of standard volumetric flow and mass flow regardless of gas composition.
- Outputs and CommunicationRS485 (Modbus RTU), 1× 4–20 mA analog output, and pulse output included as standard.
- Industrial IP67 DesignMeasuring section made of AISI 316 stainless steel, robust die-cast aluminum display housing, and IP67 protection for industrial environments.
| Parameter | DN 15 | DN 20 | DN 25 | DN 32 | DN 40 | DN 50 | DN 65 | DN 80 |
|---|---|---|---|---|---|---|---|---|
| Measured Medium | Air, non-aggressive gases, and mixed gases (non-condensing) | |||||||
| Measurement Principle | Vortex-ultrasonic (vortex frequency measurement) | |||||||
| Measured Values | Standard volumetric flow, actual volumetric flow, mass flow | |||||||
| Turndown Ratio | 1 : 50 | |||||||
| Accuracy – Volumetric Flow [% (m.v.)] | ± 1.5 (optional ± 1) | |||||||
| Accuracy – Mass Flow [% (m.v.)] | ± 2 (optional ± 1.5) | |||||||
| Repeatability [% (m.v.)] | ± 0.3 | |||||||
| Media Temperature [°C] | -40 … +100 | |||||||
| Process Pressure [bar(g)] | up to 40 | |||||||
| Protection Class | IP67 | |||||||
| Measuring Section Material | AISI 316 stainless steel, plastic | |||||||
| Display Housing | Aluminum, die-cast | |||||||
| Power Supply [VDC] | 18 … 36 | |||||||
| Signal Outputs (Standard) | RS-485 (Modbus RTU), 1× 4–20 mA, pulse output | |||||||
| Signal Outputs (Optional) | Ethernet (Modbus TCP), Ethernet PoE, M-Bus | |||||||
| Process Connection | Threaded R 1/2" – R 2", NPT 1/2" – 2", flanges DIN EN 1092-1 or ANSI Class 150 / 300 | |||||||
Why Choose the VU 570?
Independent of Gas Composition
Suitable for unknown, variable, and mixed gases. Integrated pressure and temperature compensation ensures reliable measurements regardless of the gas composition.
High Accuracy Under Dynamic Conditions
The innovative vortex-ultrasonic measuring principle provides stable and accurate measurements even during rapid pressure and temperature changes and at high mass flow rates.
Wide Measuring Range
Wider measuring range than conventional vortex sensors and reliable measurement even at very low flow velocities (from 0.3 m/s).
No Moving Parts
Completely free of mechanical moving parts – no wear, minimal maintenance, and a long service life even in demanding industrial environments.
For Technical and Mixed Gases
Ideal solution for technical gases, mixed gases, compressed air in the PET industry, and gases such as LPG, propane, and krypton.
Industrial and Technical Gases
Gas Flow MeasurementAccurate measurement of technical and industrial gas consumption, even when the gas composition is unknown or variable, with integrated pressure and temperature compensation.
PET and Packaging Industry
Compressed AirFlow measurement of compressed air in PET packaging production, where high dynamics, stability, and a wide measuring range are essential.
Energy and Fuel Gases
LPG / PropaneSuitable for measuring the flow of LPG, propane, and other fuel gases in industrial and energy applications.
Electronics and Specialty Gases
High AccuracyMeasurement of specialty and technical gases (e.g. krypton) in high-tech manufacturing processes where stable and repeatable measurements are required.
Measuring devices
Tell us what you measure and we will propose the right instrument.
Fill in a short form and we will prepare a proposal for measurement equipment and implementation based on the medium, measuring range, and measurement objective.
Proposal of the right instrument type and measuring range
Measurement reports, trends, and interpretation of results
Supply, installation, calibration, and service
Where to find us
DirectionsPod lipami 4 · 1370 Logatec, Slovenija
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