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

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 tried-and-tested systems for consumption and Flow measurement, which, in combination with our specially developed software solutions, are both uniquely effective and efficient.

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 pressurised pipes 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 characterised by a high Accuracy < 0.5 % of Measured value over an extremely wide Measuring range and is used as a reference measuring device
• 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 customisable 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.