Proven flow meters and flow measurement devices for compressed air and gas

Not sure which flow meter is right for your specific application? Then simply contact us in advance. As a leading supplier of flow meters and systems for consumption measurement, we will be happy to help you find the right system for measuring the flow of your compressed air or gas system and will make you a non-binding offer.

20 products

VA 500 - Flow meter for compressed air and gases

RS 485 interface, Modbus RTU, 4...20 mA analogue output for m³/h, Pulse output for m³.

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VA 520 - Flowmeter with integrated measuring section

VA 520 - Thermal mass flow meter for flow measurement

for compressed air and gases. New digital electronics - improved accuracy.

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DVGW approval and explosion protection with Ex or ATEX certificate

VA 550 - Thermal mass flow sensor for flow measurement

Insertion type sensor for demanding industrial applications, with ATEX approval for Ex zones or DVGW approval for use in natural gas.

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VA 570 - Thermal mass flow meter with integrated measuring section and ATEX and DVGW approval

VA 570 - Thermal mass flow meter for consumption measurement

ATEX approval for hazardous areas and DVGW approval for use in natural gas.

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VA 521 - Compact Inline flow meter for compressed air and other gas types

The ideal device for energy monitoring in compressed air and other gas systems with many consumers.

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VA 525 - Compact in-line flow sensor

The ideal device for energy monitoring in compressed air and nitrogen systems with many consumers.

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For pipes from ¾'' to 20''

VD 500 – Flow meter for FAD measurement

For measuring immediately downstream of the compressor in moist air up to +180 °C

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VD 520 - Inline flow meter

Measuring range 2 to 224 m/s / 600 m/s (Compressed air / gases) or 0.04 to 500 mbar differential pressure for Gases.

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VD 550 - Robust Flow sensor for Wet compressed air / gases

Measuring range 2 to 224 m/s / 600 m/s (Compressed air / gases) 0.04 to 500 mbar Differential pressure for Gases.

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Accessories

Measuring sections for precise measurements

Measuring section made of stainless steel 1.4301 incl. ball valve, up to DN 65 (R2 1/2") with external thread, from DN 80 with weld neck flange according to DIN 2633.

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Spot drilling collars

Spot drilling collars

If there is no measuring site with 1/2" ball valve present it can be set up by means of spot drilling collars.

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Drilling jig for set up a measuring site

By means of a special drilling device a measuring site with 1/2" ball valve can be easily set up within a few minutes.

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High-pressure protection

High-pressure protection

The supplementary device "high-pressure protection" serves for a safe installation and fastening of the CS sensors VA 500 under pressure.

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Thickness meter CS 0495

Thickness meter CS 0495

enables a quick, easy and accurate measurement of the wall thickness of pipes.

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The products of CS INSTRUMENTS GmbH have been leading in the field of Consumption measurement and Flow measurement of Gases for years. Customers all over the world appreciate the professional support and development spirit behind our products. Through international subsidiaries and a constantly growing worldwide sales and service network, we provide our customers with the latest Measuring technology and ensure optimum all-round support. For many applications, we offer specially developed and long-term proven systems for consumption and Flow measurement, which, in combination with our specially developed software solutions, are both uniquely effective and efficient.

Flow sensor VA550

For example, our VA550 (insertion version) and VA570 (version with integrated Measuring section) Flow sensors have been specially developed for harsh industrial applications. Thanks to the robust, impact-resistant die-cast aluminum housing, these flow sensors can be easily installed outdoors (IP65). ATEX or DVGW approval is also available on request.

The right Measuring principle for your Applications

Our volumetric flow sensors work with different physical measuring principles and thus enable the precise detection of Flow, mass flow or Standarized volume flow for numerous gas applications. Each Measuring principle offers specific advantages to provide the optimum solution for different requirements:

  • Thermal mass flow meters (VA series): The VA series uses the calorimetric principle, where a heated sensor measures the heat loss in the gas flow to directly calculate the mass flow. This type of sensor offers high Accuracy at very low and high Flows, without additional Pressure or Temperature compensation. With calorimetric flowmeters, even the smallest flow velocities from 0.1 m/s can be measured precisely. Ideal for detecting the smallest Leakages in pressure lines or gas lines up to High Speed Applications 223 m/s, based on ISO 1217.
  • Differential pressure sensors (VD series): The VD series measures the pressure drop across a measuring obstacle in the flow path and uses this to calculate the Flow rate. In addition to the classic Insertion type sensors, Venturi technology is also available here, in which a special Venturi tube is used for precise measurements at high Flow rates. CS INSTRUMENTS uses unique, special differential pressure sensors that provide accurate measurement results from as little as 2 m/s. The measuring span is 1:130, making the VD series ideal for low, medium to high flow rates, high pressures and Applications with Mixed gases, Hydrogen, CO₂ and Humidity and wet Compressed air. The VD series is characterized by a high Accuracy < 0.5 % of Measured value over an extremely wide Measuring range and is used as a reference meter
  • Vortex flow meters (VU and VX series): The Vortex flow meters of the VU and VX series use eddy current measurement for precise volume flow measurement and are ideal for high flow velocities, Mixed gases, Steam and high pressures. The Measuring principle is independent of Pressure and Temperature, which provides additional stability.

The Vortex sensors (VU and VX) and the differential pressure sensors (VD series) are equipped with integrated temperature and pressure measurement so that the mass flow or Standarized volume flow is calculated directly. This enables simple installation in the pipe without the need for an external flow calculator.

Standard volume and customizable reference conditions

The standard volume is a unit of volume measurement that enables the comparison of gas volumes at different pressures and temperatures. With all our sensors, the reference conditions can be flexibly set on the Display to show Standarized volume flows according to common standards (ISO 1217 for Compressed air and DIN 1343 for Technical gases). This ensures a reliable, standard-compliant consumption display.

A factory calibration certificate is always included with our devices. ISO certificates, which are traceable to the national standard, are also available as an option. In contrast to many other measuring methods, the pressure loss caused by our flow measurement is negligible.

Each flow meter can be equipped with various interfaces to ensure connection to your control technology, Data loggers or evaluation devices. These include, for example, 4...20mA, pulse, Modbus RTU, M-Bus or Ethernet.

  • Air / Compressed air
  • Carbon dioxide (CO2)
  • Nitrous oxide (N2O)
  • Nitrogen (N2)
  • Oxygen (O2)
  • Propane (C3H8)
  • Argon (Ar)
  • Hydrogen (H2)
  • Natural gas / Biogas
  • Helium (He)
  • Methane (CH4)
  • Vacuum

Good to know

In addition to Flow measurement, our sensors can also be used to measure leakage quantities. This provides the user with information on possible energy savings. The insertion version is the ideal flow meter for existing compressed air and gas lines and can be easily installed and removed under pressure via a ½" Ball valve. The flow sensor is available with different shaft lengths and can also be used in very large pipelines > DN 1000 or rectangular ducts.