Insertion Mass Flow Meter CS VA 500/ VA 570


Insertion Mass Flow Meter CS VA 500/ VA 570

CS Instrument Thermal Mass Flow Meter | Gas flow meter

 Insertion Mass Flow Meter Model VA 500/ VA 520

Our affordable mass flow meter for compressed air and gases works according to the approved calorimetric measuring principle. The additional pressure and temperature compensation are not necessary.

Contrary to the previously used bridge circuit the newly developed evaluation electronics records all measured values digitally. This enables very precise and fast measurements.

Due to the new evaluation electronics, all VA 500/ VA 520 models have an integrated Modbus output as a standard. So all parameters can be easily transferred via Modbus.

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Due to its compact design, it is possible to monitor all compressed air systems from the compressor to the smallest compressed air tool (1/4“ to 2 inches) with the new mass flow sensor VA 520.

VA 500 flow sensors are available for larger pipe diameters from DN 50 to DN 300. Apart from compressed air also other gases like e.g. nitrogen, oxygen, and CO2 can be measured.



VA 500


InsertionInline FlangeInline Pipe Thread
Parametersm³/h, l/min (1000 mbar, 20 °C) in case of compressed air resp. Nm³/h, Nl/min (1013 mbar, 0 °C) in case of gases
Units adjustable via keys at a displaym³/h, m³/min, l/min, l/s, ft/min, cfm,m/s, kg/h, kg/min, g/s,lb/min, lb/h
SensorThermal mass flow sensor
Measuring mediumAir, gases
Gas types are adjustable over CS service software or CS data loggerAir, nitrogen, argon, helium, CO2, oxygen, vacuum
(m.v.: of meas. value)
(f.s.: of full scale)
± 1.5 % of m.v. ± 0.3 % of f.s.
on request
± 1.0 % of m.v. ± 0.3 % of f.s.
Operating temperature:
-30...110 °C probe tube
-30...80 °C housing
-30...80 °C
Operating pressure-1...50 bar-1 to 16 bar optional to PN 40
Digital output
RS 485 interface (Modbus-RTU),
Ethernet-Interface PoE), M-Bus
Analog output4...20 mA for m³/h e. g. l/min
Pulse output1 Pulse per m³ or per liter galvanically isolated. Pulse value can be set on the display. Alternatively, the pulse output can be used as an alarm relay
Supply18...36 VDC, 5 W
Burden< 500 Ω
HousingPolycarbonate (IP 65)
Probe tube
Stainless steel, 1.4301
Mounting length 220 mm, Ø 10 mm
Mounting threadG 1/2“N/A
Ø Casing65 mmN/A
Measuring sectionN/AStainless steel, 1.4301 or 1.4571
Process connectionN/AFlange (to DIN EN 1092-1 e. g. ANSI 150 Ibs or ANSI 300 Ibs)
R 1/4“ to R 2“ (BSP British Standard Piping) or 1/2“
to 2“ NPT-thread
Mounting positionAnything

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