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

CS Instruments VA 550 can Reduce your energy costs and increase your sustainability.

CS Instruments VA 550 can Reduce your energy costs and increase your sustainability. 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 VA 550 Advantages

  • 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 are 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


Special measurement technology features:

  • 4 values on the display: Flow, total consumption, velocity, tem- perature. Units freely adjustable
  • All measured values, settings such as gas type, inner diameter, serial number and so on can be accessed via Modbus-RTU
  • Comprehensive diagnostic functions readable on the display or remote access via Modbus such as calibration cycle, error codes, serial number
  • Notification in case of exceeding the calibration cycle
  • Standard version accuracy 1.5% of m.v. ± 0.3% of f.s.
  • Precision version accuracy 1.0% of m.v. ± 0.3% of f.s
  • Measuring span of 1 : 1000 (0.1 up to 224 m/s)
  • Configuration and diagnosis via display, hand-held device PI 500, PC service software on-site
  • Gas type (air, nitrogen, oxygen, argon and so on) freely adjust- able via PC service software or external device DS 400, DS 500, PI 500
  • Reference conditions °C and mbar/hPa freely adjustable
  • Zero-point adjustment, leak flow volume suppression
  • Pressure loss negligible


Special mechanical features:

  • Robust impact-proof aluminium die cast housing for the outdoor area IP 67
  • All wetted parts made from stainless steel 1.4571
  • Suitable as an insertion version for 3/4″ to DN 1000
  • On request with DVGW approval for natural gas (up to 16 bar)
  • Pressure range up to 50 bar, special version up to 100 bar
  • Temperature range up to 180 °C
  • No moveable parts, no wear
  • Sensor tip very robust, easy to clean
  • Easy installation and removal under pressure via 1/2″ ball valve
  • Housing rotatable, display rotatable by 180°
  • Safety ring for installation and removal under pressure
  • Depth scale for precise installation


  • Underwater Noise Protection / Bubble Curtain
  • Efficiency-FAD analysis for compressors
  • Flow meters for professionals – optionally with ATEX approval
  • Flow meters for oxidizing gases
  • Consumption sensors and flow meters for inert gases
  • Flow meters for toxic and corrosive gases
  • Consumption meter for oxygen, hydrogen, carbon dioxide
  • Consumption meter for nitrogen in tire vulcanization
  • Consumption meter for gas measurement in the aerospace industry
  • Flow and consumption meter for gas measurement in the automotive industry
  • Consumption meter for gas measurement in metal processing
  • Consumption sensor for flow measurement of oxygen
  • Consumption meter for argon and nitrogen in chemistry
  • Nitrogen consumption measurement in the food industry
  • Inline consumption meter for nitrogen generators
  • Flow measurement in gas mixtures as source gas
  • Food gas measurement
  • Measurement of the flow rate in a compressed air production line in the cosmetics sector


  • 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 bar
  • 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.


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

Shopping Cart