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.

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 1×10-6mbar 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)

Types & Options red-y smart series

Thermal Mass Flow Meter red-y smart GSM 1/4" Alu


red-y smart meter GSM
High-precision Thermal Mass Flow Meter
Flow up to 60 ln/min (64 SLPM)
Body size ¼”
Anodized aluminium version

Thermal Mass Flow Controller red-y smart GSC 1/4" Alu


red-y smart controller GSC
High-precision Thermal Mass Flow Controller
Flow up to 60 ln/min (64 SLPM)
Body size ¼”
Anodized aluminium version

Thermal Mass Flow Controller red-y smart GSC 1/2" Alu Profibus


Flow up to 450 ln/min (480 SLPM)
Body size is ½”

Thermal Mass Flow Meter red-y smart GSM 1/4" Inox


Stainless Steel Versions
All mass flow meters and mass flow controllers are available in stainless steel electropolished

Thermal Mass Flow Meters and Controllers for OEM Applications


Customized OEM Solutions:
Optimize and simplify your processes with our customized & modular flow solutions
For a wide range of applications the thermal mass flow meters and mass flow controllers offer you a significant optimization and simplification of your processes.

» Contact a Mass Flow Expert
» Read our Application Stories

Technical Specifications red-y smart series

Measuring ranges
Air/Full scale freely selectableBody 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)
Instrument versions
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
Performance Data
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 timeMeter: 50 ms; Controller: 150 ms
Repeatability± 0.2% of full scale
Longterm stability< 1% of measured value / year
Power supply24 Vdc (18 – 30 Vdc), 15 Vdc on request
Current consumptionMeter: max. 100 mA; Controller: max. 250 mA
Operation pressure0.2 – 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 MaterialsAnodized aluminum, optional stainless steel electropolished
SealsFKM, NBR, optional EPDM
Pressure sensitivity< 0.2% / bar of reading (typical N2)
Temperature sensitivity0.025% FS measuring range type per 1°C (<0.012% per 1°F)
Warm-up time< 1 sec. for full accuracy
Integration & Installation
Output signals analog0-20 mA, 4-20 mA, 0-5 V, 1-5 V, 0-10 V, 2-10 V
Output signals digitalRS-485; Modbus RTU (Slave); LabView-VIs available / option: Profibus DP-V0, DP-V1
Process connectionG¼” (BSPP* female) up to 60 ln/min (64 SLPM)
G½” (BSPP* female) up to 450 ln/min (480 SLPM)
*British Standard Pipe Parallel
Inlet sectionNone required
Electrical connectionSub D plug, 9 pole
Mounting orientationAny orientation (horizontal only above 5 bar)
Test pressure16 bara (240 psia)
Leak rate< 1 x 10-6 mbar l/s He
Environmental protectionIP50
EMCEN 61326-1

Connect a single Mass Flow Controller to a PC

Connection cables, power supplies

A wide range of cables and power supply units for fast integration of the red-y smart mass flow meters and controllers is available:

  • Cables for communication with PC (USB)
  • Cables for analog communication
  • Power supply (24 Vdc)

» More Information

Display and Control Device for Thermal Mass Flow Meters and Controllers

Display and control devices

Permit the operation of up to 10 flow meters and controllers with predefined process recipes.

» More Information

Compression fittings with 50μ filter

Compression fittings with 50μ filter/ Stainless steel 1.4404 / 316L

Type/ConnectionSeals in FKMSeals in EPDM
G1/4″ to 6mmPart-N° 328-1011Part-N° 328-1031
G1/4″ to 1/4″Part-N° 328-1012Part-N° 328-1032
G1/4″ to 12mmPart-N° 328-1013Part-N° 328-1033
G1/4″ to 1/2″Part-N° 328-1014Part-N° 328-1034
G1/2″ to 12mm”Part-N° 328-1006Part-N° 328-1026
G1/2″ to 1/2″Part-N° 328-1007Part-N° 328-1027

» Datasheet compression fittings

Vacuum fitting (identical to VCR)

Vacuum fitting (identical to VCR®)

Type/ConnectionSeals in FKM
G1/4″ / 1/4″ VCRPart-N° 328-1190
G1/2″ / 1/2″ VCRPart-N° 328-1191

VCO® & VCR® are registered Trademarks of Swagelok

Vacuum fitting (identical to VCR) flange-mounted

Vacuum fitting flange-mounted (identical to VCR®)

Type/ConnectionSeals in FKMSeals in EPDM
G1/4″ / 1/4″ VCRPart-N° 328-1192Part-N° 328-1193

VCO® & VCR® are registered Trademarks of Swagelok

Male stud fittings Legris / Brass

Male stud fittings Legris / Brass

Type/ConnectionSeals in NBR
G1/4″ to 6mmPart-N° 328-1211
G1/4″ to 8mmPart-N° 328-1212
G1/4″ to 10mmPart-N° 328-1213
G1/2″ to 8mmPart-N° 328-1216
G1/2″ to 12mmPart-N° 328-1214
G1/2″ to 14mmPart-N° 328-1215

Downloads red-y smart series

329-2014_de_cablesmart.pdfred-y smart series Cable AccessoriesAccessories DatasheetsEN, DEEN, DE
329-2022_de_infosmart.pdfred-y smart series Product InformationProduct DatasheetsEN, DEUSEN, DE
329-2071_de_getredy5.pdfSoftware get red-y Product InformationProduct DatasheetsEN, DEEN, DE
329-2073_de_smartcommunication.pdfred-y smart series Digital Communication OverviewProduct DatasheetsEN, DEEN, DE
329-2079_de_smartdisplay.pdfred-y smart series Display OptionProduct DatasheetsEN, DEEN, DE
329-3017_ml_getredy.zipSoftware get red-y V5.6SoftwareMLML
329-3027_de_manualsmart110.pdfred-y smart series Operating Instructions SN>110000Operating InstructionsEN, DEEN, DE
329-3041_de_manualsmart_digicom.pdfred-y smart series Operating Instructions digital CommunicationOperating InstructionsEN, DEEN, DE
329-3042_de_manuallabview.pdfred-y smart series Operating Instructions LabviewOperating InstructionsEN, DEEN, DE
LabVIEW_2010.zipLabVIEW VIs (LabVIEW 2010 and higher)SoftwareMLML
LabVIEW_6.zipLabVIEW VIs (LabVIEW 6 and higher)SoftwareMLML
LabVIEW_8_6.zipLabVIEW VIs (LabVIEW 8.6 and higher)SoftwareMLML