CS Instruments – VA 520

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Inline thermal flow meter with integrated measuring section for highly accurate consumption measurement and leak detection.

Type Inline flow meter (integrated section)
Measuring principle Calorimetric / thermal mass flow
Outputs 4–20 mA + pulse output
Communication RS-485 (Modbus RTU), optional Ethernet/PoE, M-Bus, IO-Link
Application High accuracy incl. low-flow leak detection
Pressure drop Negligible
Type Inline flow meter (integrated section)
Measuring principle Calorimetric / thermal mass flow
Outputs 4–20 mA + pulse output
Communication RS-485 (Modbus RTU), optional Ethernet/PoE, M-Bus, IO-Link
Application High accuracy incl. low-flow leak detection
Pressure drop Negligible
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Standard equipment 1 · Options 3 · Accessories 3
  • VA 520 base inline versionInline thermal flow meter with integrated measuring section, display, and standard industrial outputs.
ParameterR 1/4"R 1/2"R 1"DN 25DN 50DN 80
SensorThermal mass flow sensor
Measured mediumAir, gases
Measuring rangeDepends on measuring section size
Accuracy (standard)± 1.5% of reading + ± 0.3% full scale
Operating temperature [°C]-30 … +80
Operating pressure [bar]-1 … 16 (optional PN 40)
Digital interfacesRS-485 Modbus RTU; optional Ethernet (PoE), M-Bus, IO-Link
Analog output4–20 mA
Pulse outputPulse per m³ or liter (galvanically isolated)
Power supply18 … 36 VDC, 5 W

High accuracy across the full range

High measurement accuracy even at low flow rates enables reliable consumption and leak monitoring.

Inline measurement without bypass

Integrated measuring section with defined inlet/outlet section enables direct installation in existing pipelines.

Negligible pressure drop

Calorimetric principle without moving parts provides very low pressure drop and minimal process influence.

Ideal for leak detection

High low-end resolution enables efficient leak detection and energy optimization.

Industrial communication

Supports Modbus RTU, Ethernet (PoE), M-Bus, and IO-Link for easy BMS/PLC integration.

Energy and industrial processes

Energy sector

Energy monitoring

Reliable air and gas flow measurement to support energy monitoring and process efficiency improvements.

Compressor station

Compressor stations (FAD)

FAD measurement

Flow measurement directly in pipelines, including during system operation.

Chemical industry

Chemical industry

Process gases

Accurate technical gas flow measurement for stable and safe chemical processes.

Contact

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Where to find us
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Pod lipami 4 · 1370 Logatec, Slovenija

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