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Flow meters for compressed air and gas

Flow meters from CS Instruments work according to the calorimetric measuring principle. This means, while measuring the thermal mass flow or standard volume flow, no additional temperature and pressure compensation is necessary. The standard volume is a common volumetric unit used to compare gas quantities at different pressures and temperatures. In order to meet various standards, the reference conditions can be set directly on the display of each flow meter. Thus, our reliable flow meters provide consumption and flow measurement within the individual standard our customers wish to use them.

Kind of Thermal Mass Flow meter :

1. VA 500 Flow sensor for compressed air and gas

Contrary to the previously used bridge circuit the newly developed evaluation electronics of our flow sensor records all measured values digitally. This leads to a better accuracy also in case of large measuring spans of 1:1000.

Special features of flow sensor VA 500:
  • RS 485 interface, Modbus-RTU as a standard

  • Option integrated display for m³/h and m³

  • Usable from 1/2“ to 12“ (DN 300)

  • Easy installation under pressure

  • 4…20 mA analogue output for m³/h resp. m³/min

  • Pulse output for m³

  • Inner diameter adjustable via keypad

  • Consumption counter resettable

  • Adjustable values at the display of the flow sensor: Reference conditions, °C and mbar, 4…20 mA scaling, pulse weight

2. VA 520 – Affordable Mass Flow Meter for Compressed Air and Gas

The new affordable mass flow meter VA 520 works according to the approved calorimetric measuring principle. An additonal pressure and temperature compenstation is 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 520 models have an integrated Modbus output as a standard. So all parameters can be easily transferred via Modbus.

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 inch) 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.

Versions of our Mass Flow Meter VA 520

3. VA 550 Flow sensor for heavy duty industrial applications

The immersion sensor VA 550 is the ideal flow sensor for installation into existing compressed air resp. gas lines from 3/4“ up to DN 500.

Special mechanical features:

  • Robust impact-proof aluminum die cast housing for the outdoor area IP 67

  • All medium-touching parts made from stainless steel 1,4571

  • As immersion sensor suitable for 3/4“ up to DN 500

  • On request with ATEX approval ATEX II 2G Ex d IIC T4

  • 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