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Digital Mass Flow Meters

RUS redy smart технические характеристики.pdf ENG redy compact manual.pdf ENG redy infosmart technical characteristics.pdf.pdf RUS redy infocompact технические характеристики.pdf ENG redy infocompact technical characteristics.pdf.pdf ENG redy smart manual.pdf

Vögtlin Thermal Mass Flow Meters

Vögtlin thermal mass flow meters and controllers (red-y smart and red-y compact series) are digital instruments based on MEMS technology for precise measurement and control of gas mass flow without influence from pressure or temperature. They directly measure gas mass, offer high accuracy (up to ±0.3% FS + ±0.5% of reading), wide turndown ratio (up to 1:100), and support for many gases (including mixtures). Available as stationary (smart) and portable battery-powered (compact) versions with digital interfaces and get red-y software for management.

Operating Principle

The instruments use a thermal principle with CMOS sensor (MEMS technology): a portion of the gas flow passes through a thin capillary with a heater and two temperature sensors. The temperature difference is proportional to the mass flow (number of gas molecules). The sensor provides fast ADC conversion directly on the chip, with built-in temperature and pressure compensation. This makes the measurement independent of P and T fluctuations within the specified range.

Description by Series

red-y smart series High-precision stationary series of meters (GSM) and controllers (GSC) for industrial gas supply systems. Versions: Standard (±1% FS, 1:50) and Hi-Performance (±0.3% FS + ±0.5% reading, 1:100). Range: up to 450 ln/min (air). Supports Modbus RTU (standard), Profibus/Profinet/EtherCAT (optional), display, multigas (up to 10 gases), get red-y software. Body: aluminum/stainless steel, 24 V power supply.

red-y compact series Portable battery-powered (AA) series with touch display, independent of external power. Includes meter (GCM) and regulator with needle valve (GCR). Accuracy ±1–2% FS, range up to 450 ln/min, 1:100. Modular system (battery, external power, alarm, analog/pulse). Supports 3 gases, totalizer, alarm functions, Micro-USB. Ideal for mobile measurement and testing.

Key Features

  • Accuracy: smart Hi-Performance ±0.3% FS + ±0.5% reading; compact ±1–2% FS.

  • Turndown ratio: 1:50–1:100.

  • Response time: ~50–500 ms (model-dependent).

  • Flow rates: from 0–25 mln/min to 0–450 ln/min (air).

  • Gases: air, O₂, N₂, He, Ar, CO₂, H₂, CH₄, C₃H₈, etc. (real gas calibration).

  • Pressure: 0.2–11 bar a (max. 16 bar test).

  • Temperature: 0–50 °C (medium/gas).

  • Materials: anodized aluminum or electropolished stainless steel, seals FKM/EPDM/FFKM.

  • Interfaces: analog/digital (Modbus, Profinet, etc.), get red-y software (smart), touch display (compact).

  • Additional: IP50, pressure sensitivity <0.2%/bar, 3-year warranty.

Applications

  • Gas supply and mixing systems in industrial automation.

  • Laboratory and research applications.

  • Testing, service, and calibration (especially compact).

  • OEM integration, gas panels, processes with pure gases.

  • Energy, semiconductor, pharmaceutical, and food industries.

The red-y series is a reliable Swiss solution for precise and stable gas flow control.