Data sheet - VU 570 - EN

Product catalog summary

Overview: The VU 570 is a vortex ultrasonic flow sensor designed for measuring the flow of technical and mixed gases. It offers precise measurement capabilities for standard volume flow, operating volume flow, and mass flow, accommodating unknown or changing gas compositions.

Key Benefits:

Accurate flow measurement in various gases, including those with rapidly changing temperatures and pressures.
Integrated pressure and temperature compensation, providing a broader measuring range than typical vortex sensors.
No moving parts, reducing wear and maintenance needs.
Precise measurements starting from 0.3 m/s.

Technical Specifications:

Measuring Range: Detailed in accompanying tables.
Measuring Medium: Air, non-aggressive gases, and mixed gases (non-condensing).
Accuracy: Volume flow ±1.5% m.v., optional ±1% m.v.; Mass flow ±2% m.v., optional ±1.5% m.v.
Process Temperature: -40°C to +100°C.
Process Pressure: Up to 40 bar.
Protection Class: IP67.
Materials: Stainless steel 316 and plastic for measuring sections; aluminium die-casting for display unit.
Signal Outputs: Standard RS 485 (Modbus-RTU), 1x 4...20 mA, pulse; optional Ethernet Interface.
Power Supply: 18–36 VDC.

Applications: Suitable for technical gases, mixed gases, compressed air in PET bottle production, CO2, LPG, propane, and krypton.

Measuring Ranges: The document provides detailed tables for measuring ranges under various conditions, specifying flow rates in m/s, m³/h, and cfm for different pipe sizes.

Options and Accessories:

Display options: Integrated or without display.
Pressure sensor options: 16 bar, 40 bar, or 1.5 bar.
Signal output options: Various configurations including Ethernet and M-Bus interfaces.
Calibration options: Real gas calibration or adjustment via gas constant.
Reference conditions and accuracy classes are specified for different operational scenarios.

Installation Details: The document includes dimensions and connection types for both flanged and threaded installations, providing specific measurements for each pipe size.

Catalog excerpts

Flow [Vortex - ultrasonic] VU 570 - Vortex ultrasonic flow sensor for technical gases and mixed gases Independent from gas composition – integrated pressure and temperature compensation – larger measuring range than common Vortex sensors Technical gases Mixed gases Compressed air in PET bottles production CO2 LPG Propane Crypton Benefits at a glance: Function principle Vortex ultrasonic: • Measurement of standard volume flow, operating volume flow, mass flow • Suitable for unknown/changing gas compositions and mixed gases • The innovative measuring principle grant a precise flow measurement in different gases • Suitable for quickly changing temperature and pressure changes as well as high mass flows Advantages towards common mechanic gas meters: • No moving parts – no wearing Advantages towards common Vortex sensors: • Precise measurement already from 0.3 m/

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TECHNICAL DATA VU 570 Measuring range: Measuring medium: Meas. principle: Aluminium - Die casting As a standard: RS 485 (Modbus-RTU), 1x 4...20 mA, puls Optional: Ethernet Interface 18…36 VDC Measuring span: Process connection: Calibration No real gas calibration F1 Adjustment of gas type via gas constant F2 Real gas calibration in selected gas type Stainless steel 316, Plastic Power supply : Signal outputs / bus connection option 2 x 4…20 mA analogue output (galv. isolated), pulse outE1 put, RS 485 (Modbus-RTU) 1 x 4…20 mA analogue output (galv. not isolated), E4 pulse output RS 485 (Modbus-RTU)...

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