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CS Instruments VA 521 - Compact Inline flow meter for compressed air & other gas types

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Reduce your energy costs and increase your sustainability with the VA 521. Monitor the consumption of each machine and analyze your leakage flows with just one measuring device.

Part Number: VA 521

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Flow meters for compressed air as well as various technical gases

Reduce your energy costs and increase your sustainability with the VA 521. Monitor the consumption of each machine and analyze your leakage flows with just one measuring device.

Advantages of the VA 521 flow sensor:

Measurement of mass flow rate, output of standard volume flow rate without additional measurement of pressure and temperature.
Compact device for installation in limited space, no inlet and outlet sections necessary due to the integrated flow straightener
Highly accurate at small as well as high flowrates
Easy installation and removal of the sensor, the integrated measuring section can remain in the line for cleaning or recalibration of the sensor and can simply be closed with a sealing cap
No moving parts, therefore low maintenance required
Can be used for compressed air and non-corrosive gases such as nitrogen, oxygen, argon, helium, etc.

Technical details:

04...20 mA, pulse and a Modbus RTU (RS 485) interface as standard
Optional interfaces: Modbus TCP (Ethernet), PoE, M-Bus
Pressure range up to 40 bar
Temperature range up to 80°C
Integrated display to show the measured values
Available from ½" to 2''
Settings adjustable via the keys of the display
Main counter can be reset via the display
For velocities up to 224 Nm/s
Extremely precise with an accuracy of ± 1.5% or ± 1% of the measured value - as well as ± 0.3% of the final value

Technical Information
Parameters:	m³/h, l/min (1000 mbar, 20 °C) in case of compressed air or Nm³/h, Nl/min (1013 mbar, 0 °C) in case of gases
Units adjustable via keys at display:	m³/h, m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min, g/s, lb/min, lb/h
Sensor:	Thermal mass flow sensor
Measured medium:	Air, gases
Gas types are adjustable over CS service software or CS data logger:	Air, nitrogen, argon, CO2, oxygen
Measuring range:	See table
Accuracy: (o. M. V. = of measured value) (o. F. S. = of full scale)	± 1.5% of m.v. ± 0.3 % of f.s. on request: ± 1% of m.v. ± 0.3% of f.s.
Operating temperature:	-30…80 °C
Operating pressure:	Up to 16 bar, optionally 40 bar
Digital output:	RS 485 interface, (Modbus-RTU), optional M-Bus, Ethernet interface or PoE
Analogue output:	4…20 mA for m³/h or l/min
Pulse output:	1 pulse per m³ or per litre electrically isolated. Pulse weight can be set on the display. Alternatively, the pulse output can be used as an alarm relay
Supply:	18…36 VDC, 5 W
Burden:	< 500 Ω
Housing:	Polycarbonate (IP 65)
Measuring section:	Aluminium, 316L
Connection thread of measuring sections:	G 1/2" to G 2" (BSP British Standard Piping) or 1/2" to 2" NPT thread
Mounting position:	any

Which compressed air flow meter should be used at which point?

Flow meters for compressed air as well as various technical gases

Reduce your energy costs and increase your sustainability with the VA 521. Monitor the consumption of each machine and analyze your leakage flows with just one measuring device.

Advantages of the VA 521 flow sensor:

Measurement of mass flow rate, output of standard volume flow rate without additional measurement of pressure and temperature.
Compact device for installation in limited space, no inlet and outlet sections necessary due to the integrated flow straightener
Highly accurate at small as well as high flowrates
Easy installation and removal of the sensor, the integrated measuring section can remain in the line for cleaning or recalibration of the sensor and can simply be closed with a sealing cap
No moving parts, therefore low maintenance required
Can be used for compressed air and non-corrosive gases such as nitrogen, oxygen, argon, helium, etc.

Technical details:

04...20 mA, pulse and a Modbus RTU (RS 485) interface as standard
Optional interfaces: Modbus TCP (Ethernet), PoE, M-Bus
Pressure range up to 40 bar
Temperature range up to 80°C
Integrated display to show the measured values
Available from ½" to 2''
Settings adjustable via the keys of the display
Main counter can be reset via the display
For velocities up to 224 Nm/s
Extremely precise with an accuracy of ± 1.5% or ± 1% of the measured value - as well as ± 0.3% of the final value

CS Instruments VA 521 - Compact Inline flow meter for compressed air & other gas types

Advantages of the VA 521 flow sensor:

Technical details:

Technical Information

Which compressed air flow meter should be used at which point?

Advantages of the VA 521 flow sensor:

Technical details:

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