VA 520 - Flowmeter with integrated measuring section
Recalibration of the VA520 flowmeter
Cleaning the VA520 consumption meter
Sensor tip / measuring tip of the VA520 flowmeter
Setting / initial installation via display
Display rotation function for overhead mounting, etc.
Versions of the VA520 meter for compressed air and gases
DVGW approval now available for VA520

VA 520 - Thermal mass flow meter for flow measurement

Record and reduce your energy costs and increase your sustainability with the VA 520. Monitor your consumption and analyze your leakages with a permanently installed flow meter in distribution stations, in front of individual departments or for billing purposes of individual consumers.


  • Measurement of mass flow rate, output of standard volume flow rate 
  • High accuracy for both small and large flows
  • Pressure and temperature compensated by the thermal mass flow principle 
  • 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
  • Vanishingly low pressure loss due to vanishingly low blockage of the diameter
  • Can be used for compressed air and non-corrosive gases such as nitrogen, oxygen, argon, helium, etc.
  • 04...20 mA, pulse and a Modbus RTU (RS 485) interface as standard, optional interfaces such as Modbus TCP (Ethernet), PoE, M-Bus 
  • Optional interfaces such as Modbus TCP (Ethernet), PoE, M-Bus 
  • Optional: Bi-directional measurement 
  • Pressure range up to 40 bar
  • Temperature range from -30 to 80°C
  • Protection class IP65
  • Integrated display to show the measured values 
  • Can be used from DN 8 to DN 80
  • Settings adjustable via the keys of the display 
  • Main counter reading can be reset via the display 
  • For velocities up to 224 Nm/s
  • Highly accurate with an accuracy of ± 1.5% or ± 1% of the measured value  -  as well as ± 0.3% of the final value

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