Vögtlin Instruments' High-Precision Thermal Mass Flow Meters & Mass Flow Controllers for Gases

Reliable technology and industry standard interfaces make the red-y smart series thermal mass flow meters (MFM) and mass flow controllers (MFC) particularly suitable for measurement and control in gas delivery systems and plant engineering applications.

Core Features

Accurate Measurement

The massflow devices offer high accuracy and a wide dynamic range with 2 different instrument versions “Standard” and “Hi-Performance”:

Accuracy up to ± 0.3% of full scale + ±0.5% of reading
Turndown ratio 1 : 100 (extended turndown ratio on request)

Analog & Digital

The mass flow meters and controllers of the red-y smart series make use of the latest MEMS technology and have a digital (Modbus RTU) and analog interface as standard.

Profibus interface is available as option (Profibus DP-V0/DP-V1).

A wide range of cable and power supply accessories is available

Operating Status Indication

The measurement and control instruments offer a built-in LED status indication

Safe & Fast Control

The red-y smart controller uses a tightly sealed control valve with a leak rate of less than 1×10-6 mbar l/s He. Response times of approx. 150 msec for very fast set point control

get red-y Software

Efficient device management with the free get red-y software:

  • View flow rate & temperature
  • Change set points
  • Select measured gas
  • Visualization of measured data
  • Adjusting control parameter

Optional modules get red-y software:

  • Datalogging
  • Gasmixing
  • Adjustment/Calibration

See all available cables and power supply accessories for easy PC connection.


Built-in display
Display includes: Flow rate, totalizer, unit of measure & set point control (controller only)

One meter or controller can be used for up to 10 different gases or gas mixtures

The instruments are available with Profibus interface: DP-V0 & DP-V1 protocols

Display and Control Device PCU-10
The PCU-10 permits the operation of up to 10 flow meters and controllers with predefined process recipes
» More Information

[Thermal Mass Flow Meters & Controllers for Gases with built-in display]

3-Year Warranty

High-quality components ensure long and trouble-free operation (does not apply to calibration, options and accessories)

Technical Specifications

Technical Specifications red-y smart series

Air/Full scale freely selectable Body size ¼” from 0 … 25 mln/min to 0 … 60 ln/min (from 0 … 27 SCCM to 0 … 64 SLPM)
Body size ½” from 0 … 60 ln/min to 0 … 450 ln/min (from 0 … 65 SLPM to 0 … 480 SLPM)
The economic solution
Accuracy: ± 1.0% of full scale*
Turndown ratio: 1 : 50
With highest accuracy and turndown ratio
(available for GSM < 200 ln/min (200 SLPM) /
GSC < 150 ln/min (150 SLPM) (air))
Accuracy: ± 0.3% of full scale + ± 0.5% of reading*
Turndown ratio: 1 : 100
*An additional error of ±0.25% may apply for analogue signals
Media (real gas calibration) Air*, O2*, N2, He, Ar, CO2, H2, CH4, C3H8 (other gases and gas mixtures on request)
*O2 & N2 are calibrated with air
Response time Meter: 50 ms; Controller: 150 ms
Repeatability ± 0.2% of full scale
Longterm stability < 1% of measured value / year
Power supply 24 Vdc (18 – 30 Vdc), 15 Vdc on request
Current consumption Meter: max. 100 mA; Controller: max. 250 mA
Operation pressure 0.2 – 11 bar (3 – 160 psia) / GSC with valve type 4.5 and 8: max. 8 bara (120 psia)
Temperature (environment/gas) 0 – 50 °C (32 – 122 °F)
Body Materials Anodized aluminum, optional stainless steel electropolished
Seals FKM, NBR, optional EPDM
Pressure sensitivity < 0.2% / bar of reading (typical N2)
Temperature sensitivity 0.025% FS measuring range type per 1 °C (<0.012% per 1 °F)
Warm-up time < 1 sec. for full accuracy
Output signals analog 0-20 mA, 4-20 mA, 0-5 V, 1-5 V, 0-10 V, 2-10 V
Output signals digital RS-485; Modbus RTU (Slave); LabView-VIs available / option: Profibus DP-V0, DP-V1
Process connection G¼” (BSPP* female) up to 60 ln/min (64 SLPM)
G½” (BSPP* female) up to 450 ln/min (480 SLPM)
*British Standard Pipe Parallel
Inlet section None required
Electrical connection Sub D plug, 9 pole
Mounting orientation Any orientation (horizontal only above 5 bar)
Test pressure 16 bara (240 psia)
Leak rate < 1 x 10-6 mbar l/s He
Environmental protection IP50
EMC EN 61326-1