Mass Flow Meters

Gas mass flow meter

Alicat mass flow meters can save customers up to 68% on yearly cost of ownership.

Alicat Scientific offers one of the lowest cost NIST traceable recalibrations on the market. As quality standards are now demanding that precision instruments be recalibrated once per year, or more, companies using Alicat mass flow meters realize significant cost savings in the first year alone.
Download M-Series Data Sheet

Mass flow meters are most commonly found in systems that require precise measurement of process gases. Alicat Scientific’s M series digital/analog mass flow meter is an accurate, repeatable, and customizable mass flow meter designed to be used in a variety of applications. Alicat’s patented laminar flow technology delivers incredibly fast and inherently linear mass flow measurement. The meter is also equipped with a host of standard features like 200:1 turndown ratio resulting in a usable range that is 1/200th the full scale flow rate; 30 on-board user selectable gas calibrations to reduce inventory requirements and need for costly recalibrations when switching process gases; A fully functional digital display with push button controls that allow users to interact with the meter without the need of specialized communication systems or software; And, a lifetime warranty that could potentially save hundreds of dollars in repair costs over the life of the instrument. Alicat’s M series mass flow meters deliver industry leading performance designed to last a lifetime.

The Alicat Scientific’s M series digital / analog mass flow meter was designed to meet and exceed the requirements that customers place on mass flow meters:


Alicat M series mass flow meters were designed to be used as a stand-alone device. With the native display, a user can easily change the configuration of the meter without the need for computers, complicated software or scripts.


Alicat M series mass flow meters can be configured with an accuracy spec of up to +/-(0.4% of reading + 0.2% of full scale) with a high-accuracy calibration. Standard calibrations are rated at +/-(0.8% of reading + 0.2% of full scale)

Reduced Cost of Ownership

Alicat M series flow meters require very little power to run thereby reducing operating costs. M series flow instruments also have less pressure drop when compared to similar flow devices. Reduced pressure drop means more process fluids go into your process and not into your measurement devices. The M series mass flow meters also measure pressure, temperature and volumetric flow in addition to mass flow which means fewer instruments you will have to buy and install. Adding a totalizer allows users to see how much media has flowed through the system, making it a great way to monitor usage and identify waste.


M series mass flow meters are available in any flow range from 0.5SCCM through 3000SLPM. They are equipped with multiple analog outputs in addition to the RS-232 digital output. The M series meter can also be orderd as a MB series 9V battery powered flow meter to make a stand alone secondary calibration standard or flow verification meter.


With a response time of under 10 milliseconds, Alicat mass flow meters respond more than twice as fast as your eye can blink.

Small Size

The M series mass flow meter has a footprint of 2.38′X1.050′ through 5.2′X2.9′ making it easy to integrate into systems or to use as a stand-alone calibrator.


Alicat’s patented technology allows its mass flow meters to have very few moving parts. All of the internal components are fixed in place resulting in very little physical change inside the mass flow meter. Little physical change in the flow cavity means higher rates of consistency and repeatability. Alicat M series mass flow meters have a repeatability of +/-0.2% of FS


Alicat mass flow meters around the world are being used in processes like leak detection, flow monitoring and atmospheric testing.

All Alicat Scientific mass flow meter calibrations are NIST traceable.

Mass flow meter display

Standard Features

  • Fully functional digital display
  • Multiple parameter measurement: Mass flow, volumetric flow, temperature, and pressure
  • Low pressure drop operation
  • No warm up time
  • Viton seals
  • 8 pin mini din electronic connector
  • Standard barrel type power connector
  • RS-232 Multi-drop digital output
  • Choice of 0-5Vdc, 0-10Vdc, or 1-5Vdc analog output
  • Multi-gas calibration: up to 130 Gas Select™ gases preloaded, includes COMPOSER™ custom gas composition software.
  • 200:1 turndown ratio
  • NPT process connections
  • Can be ordered in any flow range between 0.5SCCM and 3000SLPM
  • Lifetime warranty

Optional features and equipment

  • High accuracy calibration
  • Flow totalizer
  • Locking 6 pin, DB9 or DB15 connector
  • ProfiBUS digital output
  • Modbus digital output
  • RS-485 digital output
  • 4-20mA analog output
  • Secondary analog output
  • Color backlit TFT display
  • Remote panel mount display
  • Remote panel mount color backlit TFT display
  • Acrylic Mil-spec dielectric conformal coating
  • EPDM seals
  • NeSSI flow body
  • Oxygen cleaned
  • Remote electronic package for high temp environments
  • SAE process connections
  • VCR, VCO style welded fittings
  • 5VDC, 12VDC, 24VDC, or open drain flow alarms (high or low)
  • Bi-directional flow
  • Additional calibration points
  • Custom gas blends with up to 4 gases
  • Custom mass based flow range

Gas Select™ 5.0 Gas List for Alicat Mass Flow Meters and Controllers

All Alicat Scientific mass flow meters and mass flow controllers come standard with NIST Ref Prop 9 gas properties data for up to 130 preloaded gas calibrations. Users may switch between selected gases on the fly without any need for recalibration of the mass flow meter or controller. All Gas Select™ calibrations retain the instrument's specified NIST-traceable calibration accuracy. (See individual specifications sheets for details.)
Pure GasesBioreactor Gas MixesPure Corrosives
• Air
• Argon
• i-Butane
• n-Butane
• Carbon dioxide
• Carbon monoxide
• Deuterium
• Ethane
• Ethylene (Ethene)
• Helium
• Hydrogen
• Krypton
• Methane
• Neon
• Nitrogen
• Nitrous Oxide
• Oxygen
• Propane
• Sulfur Hexafluoride
• Xenon
• 5% CH4 95% CO2
• 10% CH4 90% CO2
• 15% CH4 85% CO2
• 20% CH4 80% CO2
• 25% CH4 75% CO2
• 30% CH4 70% CO2
• 35% CH4 65% CO2
• 40% CH4 60% CO2
• 45% CH4 55% CO2
• 50% CH4 50% CO2
• 55% CH4 45% CO2
• 60% CH4 40% CO2
• 65% CH4 35% CO2
• 70% CH4 30% CO2
• 75% CH4 25% CO2
• 80% CH4 20% CO2
• 85% CH4 15% CO2
• 90% CH4 10% CO2
• 95% CH4 5% CO2
*These gases require MS/MCS-Series instruments.
• Ammonia
• Butylene (1-Butene)
• Cis-Butene
• Iso-Butene
• Trans-Butene
• Carbonyl Sulfide
• Chlorine
• Dimethylether
• Hydrogen Sulfide
• Nitrogen Trifluoride
• Nitric Oxide
• Propylene
• Silane
• Sulfur Dioxide
Breathing GasesFuel Gas MixesRefrigerants
• EAN-32
• EAN-36
• EAN-40
• EA-40
• EA-60
• EA-80
• Heliox-20
• Heliox-21
• Heliox-30
• Heliox-40
• Heliox-50
• Heliox-60
• Heliox-80
• Heliox-99
• Metabolic Exhalant
Coal Gas 50% H2+35% CH4+10% CO+5% C2H4
Endothermic Gas 75% H2+25% N2
HHO 66.67% H2+33.33% O2
LPG HD-5 96.1% C3H8+1.5% C2H6+0.4% C3H6+1.9% n-C4H10
LPG HD-10 85% C3H8+10% C3H6+ 5% n-C4H10
Nat Gas 93% CH4+3% C2H6+1% C3H8+2% N2+1% CO2
Nat Gas 95% CH4+3% C2H6+1% N2+ 1% CO2
Nat Gas 95.2% CH4+2.5% C2H6+0.2% C3H8+0.1% C4H10+1.3% N2+0.7% CO2
Syn Gas 40% H2+29% CO+20% CO2+11% CH4
Syn Gas 64% H2+28% CO+1% CO2+7% CH4
Syn Gas 70% H2+4% CO+25% CO2+1% CH4
Syn Gas 83% H2+14% CO+3% CH4
*These gases require MS/MCS-Series instruments.
• R-11
• R-14
• R-22
• R-23
• R-32
• R-115
• R-116
• R-124
• R-125
• R-134A
• R-142B
• R-143A
• R-152A
• RC-318
• R-404A
• R-407C
• R-410A
• R-507A
Chromatography GasesOxygen Concentrator Gas Mixes
• P-5
• P-10
• 89% O2+7% N2+4% Ar
• 93% O2+3% N2+4% Ar
• 95% O2+1% N2+4% Ar
Welding GasesStack/Flue Gas MixesLaser Gas Mixes
• C-2
• C-8
• C-10
• C-15
• C-20
• C-25
• C-50
• C-75
• He-25
• He-50
• He-75
• He-90
• A1025
• Stargon CS
• 2.5% O2+10.8% CO2+85.7% N2+1% Ar
• 2.9% O2+14% CO2+82.1% N2+1% Ar
• 3.7% O2+15% CO2+80.3% N2+1% Ar
• 7% O2+12% CO2+80% N2+1% Ar
• 10% O2+9.5% CO2+79.5% N2+1% Ar
• 13% O2+7% CO2+79% N2+1% Ar
• 4.5% CO2+13.5% N2+82% He
• 6% CO2+14% N2+80% He
• 7% CO2+14% N2+79% He
• 9% CO2+15% N2+76% He
• 9.4% CO2+19.25% N2+71.35% He
• 9% Ne+91% He

Operating manual

Mass flow meter operating manual:

Mass flow meter product specifications: