Digital Massflow Meters for Gases red-y compact series:
Comparison of device generations 1 & 2

Digital Massflow Meters red-y compact series ‚Äď Comparison of product version

In 2015, Vögtlin Instruments AG launched a completely redesigned version of the digital massflow meters red-y compact series with touch technology and AA battery power.
With this new generation, we are leading our proven and well-known massflow instruments in a future-oriented device concept with enhanced features and optimized operation.

See below a comparison of the two massflow device generations:

red-y compact 1 seriesred-y compact 2 series
red-y compact series digital massflow meters device generation Ired-y compact series digital massflow meters device generation II
IdentificationSN < 299999 / Produced from 2000 to 2015SN > 300000 / Produced as of 2015
SensorClassical CMOS sensorLatest CMOS sensor generation
Processor8 bit microcontroller32 bit microcontroller
Display6-digit LC-display
LC-Display of digital massflow meters red-y compact series I
Dot-matrix touch display (128√ó64 px)
Touch display of digital massflow meters red-y compact series II
Display adjustmentHorizontal adjustmentAutomatic position adjustment (position sensor)
BacklightNot availableYes, with external power supply (24 Vdc or Micro-USB)
MediaDry, non-aggressive/non-corrosive gasesDry, non-aggressive/non-corrosive gases
Measuring rangesFrom 1 mln/min up to 450 ln/min (air)From 1 mln/min up to 450 ln/min (air)
Gas/calibration1 gas/calibrationUp to 3 gases/calibrations
Measuring units/scaleFactory setWide choice of freely selectable flow units
AccuracyEco: ¬Ī 2.0% of full scale
Special: ¬Ī 1.0% of full scale
Eco: ¬Ī 2.0% of full scale
Special: ¬Ī 1.0% of full scale
Turndown ratio1 : 50Eco: 1 : 50
Special: 1 : 100
Manual control valveAvailable for type GCR & GCAAvailable for type GCR & GCA
Power supplyLithium battery or +12…30 VdcStandard AA battery or +12…30 Vdc
or Micro-USB (DIN 62684)
Battery lifetime12 Р18 months (with constant flow)Depending on the selected Power Safe Mode
approx. 300 operating hours
up to 6 months with non-continuous operation
NOTE: For consumption measurement, we recommend external power supply (24 Vdc )
Password protectionNot availablePassword protected menu available
Firmware updateNot availableFirmware updates via USB interface
Factory settingsNot resettableResettable via menu
Sampling interval of display100 ms with external power 24 Vdc
500 ms with battery power 
40 ms with external power (USB or 24 Vdc)
500 ms with battery power
BodyAnodized aluminium or
stainless steel 1.4305 (303)
Anodized aluminium or
stainless steel
 1.4404 (316-L)
DimensionsSee datasheetIdentical dimensions as red-y compact series 1
See datasheet
Datasheetred-y compact 1 series datasheet PDFred-y compact 2 series datasheet PDF