CS Instruments VA 550 - Thermal Mass Flow Sensor For Flow Measurement

Flow meters for compressed air and other technical gases. Reduce your energy costs and increase your sustainability with the VA 550.


Flow meters for compressed air and other technical gases. Reduce your energy costs and increase your sustainability with the VA 550. Monitor your consumption and analyze your leakage flows with just one measuring device. Due to its design, it is also ideal for mobile measurements.


CS Instruments

CS Instruments

CS Instruments GmbH & Co. KG with locations in 24955 Harrislee and 78052 Villingen-Schwenningen/ Tannheim, is managed by Dipl. Eng. (FH) Wolfgang Blessing as sole Managing Director.

CS Instruments GmbH was established in the year 2002 by Christian Schuldt and Wolfgang Blessing as equal shareholders/Managing Directors.

Wolfgang Blessing already was sound a specialist on the sector of compressed air technology resp. industrial measurement technology long before the establishment of CS Instruments GmbH in the year 2002. Prior to the foundation of CS Instruments GmbH Dipl. Ing. (FH) Wolfgang Blessing acted for more than 10 years as primarily responsible product manager for industrial measurement technology at a worldwide known manufacturer of measuring instruments for compressed air and gases in the Black Forest. The technical knowledge and experience matched with the long-term practical knowledge was the corner stone for the success of CS Instruments.


  • All wetted parts are made of stainless steel, especially for applications with high demands on cleanliness and surface quality
  • Rough industrial applications can be realized due to robust aluminum housing
  • Recommended for flammable gases such as natural gas, hydrogen, biogas, etc. due to ATEX or DVGW approval
  • Measurement of mass flow rate, direct output of standard volume flow rate
  • Highly accurate at small as well as large flows
  • Pressure and temperature compensated by the thermal mass flow principle
  • Quick and easy installation via a standard ½” ball valve
  • No moving parts, therefore low maintenance
  • Vanishingly low pressure loss due to vanishingly low blockage of the diameter


  • Application report underwater noise protection
  • for combustible gases
  • for health-endangering, toxic and skin-corrosive gases
  • for flow and consumption measurement of oxygen ( O2), hydrogen (H2), carbon dioxide (CO2)
  • for argon and nitrogen in metal production and metal processing
  • food and beverage industry


  • 04…20 mA, Pulse and a Modbus RTU (RS 485) interface as standard, optional interfaces like Modbus TCP (Ethernet), PoE and M-Bus available
  • Pressure resistance up to 100 bars
  • Temperature range up to 180°C
  • Protection class IP 67
  • Integrated display for a visualization of the measured values
  • Can be used from DN 20 to DN 2000, larger diameters on request
  • Easy installation under pressure
  • 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 m.v. as well as ± 0.3% of f.s.

Couldn’t find what you were looking for?

Contact us with your specification for assessment and availability of other products configurations.

Click Here