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Mass Flow Sensors

Mass Flow Sensors - Q-Flow

Vögtlin Instruments GmbH

  • Variable area flowmeters for gases
  • Compact unit with high-quality components
  • Intelligent instrument design for easy component replacement
  • Customized versions with options like stainless steel, EPDM/FKM seals, and various connections

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Description Vendor
  • The Q-Flow Variable Area Flowmeters are compact, high-quality flowmeters designed for gas flow measurement.
  • They feature a proven design with stable and flexible characteristics, allowing for quick and easy replacement of components. The flowmeters are available in two sizes with measuring tubes of 80mm and 140mm, and come with a standard scale for air under operating conditions of 20°C and 1013 mbar abs.
  • The bodies are made of aluminium, and they are equipped with tightly closing precision control valves that are hysteresis-free. The intelligent instrument design enables easy component replacement while installed. Customized versions are available, including options like mm-scale with flow rate tables, direct reading scales for other gases and pressures, stainless steel versions, and various sealing materials (FKM, EPDM, FFKM) and valve configurations.
  • These flowmeters are suitable for high accuracy applications and offer a wide range of measuring ranges with direct reading scales. They are also compatible with different gases and operating conditions, with conversion factors provided for accuracy.

Use Cases

  • Measuring gas flow in laboratories
  • Customized flow solutions for specific applications
  • Flow measurement in industrial settings with variable area flowmeters

Capabilities

  • Direct reading flow measurement for air under defined operating conditions
  • Gas flow measurement with correction using conversion factors for pressure, temperature, and gas type
  • Mechanical flow adjustment via integrated precision micro valve
  • Operation up to 10 bar and 0–100 °C
Vögtlin Instruments GmbH Vögtlin Instruments GmbH is a manufacturing company specializing in mass-flow meters and controllers calibrated for hydrogen. The broader business is instrumentation-oriented, with sensors and analyzers supplied either as stand-alone instruments or embedded into machines, process skids, safety systems, laboratories, and plant automation so operating conditions can be measured and documented. The company’s products typically provide information to a larger control, safety, quality, or test system, making measurement accuracy, response behavior, interfaces, calibration, and environmental suitability part of the integration task. For hydrogen, the company’s actual role is defined by the specific pressure, flow, gas-detection, concentration, quality, temperature, electrical, or other measurement functions described in its portfolio; different suppliers cover different parts of this measurement layer. Its instruments measure and regulate low to medium gas flows in electrolyzer development, fuel-cell testing, laboratories, and process systems. The company provides compact digital flow devices and application support for precise hydrogen dosing and measurement. Within the hydrogen value chain, Vögtlin Instruments GmbH therefore supplies instrumentation, monitoring, or safety technology to OEMs, test organizations, plant integrators, infrastructure developers, and industrial operators handling hydrogen.
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