Alicat portable mass flow calibrator with optional backlit color display

Alicat portable mass flow calibrator with optional backlit color display

Laboratory-grade flow verification in 20 seconds!

Stopping an operational process for validation or calibration is a necessary evil. Alicat’s portable flow calibrators make this procedure more palatable by reducing the downtime and disruption to your process. Get in. Validate. Get out.

Nothing is faster! Calibrate in real time with multiple gases across wide flow ranges. Our portable mass flow meters are the fastest way to verify flow rates in the world. They employ our patented differential pressure-based flow measurement technology, which is powered by a high-efficiency lithium-ion battery that yields 18 hours of continuous operation for monochrome displays (5 hours with backlit color displays).
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Making You Faster

  • Now including COMPOSER™ gas composition software!
  • 5-ms speed of response.
  • No warm-up required: ready to calibrate in one second.
  • Stand-alone unit: no need for computer or external power.
  • All flow data visible on one screen (mass flow, volumetric flow, absolute pressure, temperature).
  • Battery status indicator never leaves you without power.
  • Digital and analog outputs.

Download Brochure Download Manual

MB Standard Series

Calibrate on the go with the fastest flow verifier in the world. View specs.

MWB Low Pressure Drop Series

Minimize system impact with pressure drops as low as 4 mbar at full-scale flows. Alicat “Whisper” Series meters also respond faster in leak testing applications. Max range: 0-500 slpm. Click here for more information about the Whisper Series.

MBS Anti-Corrosive Series

Withstand corrosion caused by aggressive gases with durable 316L stainless steel. Click the “Quick Specs” tab for a listing of included corrosive gas calibrations. View specs.

Alicat Portable Calibration Unit

PCU Multi-Range Portable Calibration Unit

Alicat’s PCU-Series portable calibration units are secondary calibration standards that can go anywhere to verify the operation of flow equipment. Each PCU combines up to three custom-ranged mass flow meters with totalizers and high-accuracy calibration (0.4% reading + 0.2% full-scale range). These are housed inside a rugged industrial carrying case and powered by two 9-volt batteries (AC connections also included). The PCU includes integrated push-connect fittings for each meter, plus a copy of Alicat’s Flow Vision SC™ software. View specs. Also available in our “Whisper” low pressure drop configuration (PCUW Series).
Download PCU Specs Download PCU Manual

Common Instrument Options

  • High-accuracy calibration, permits use of the calibrator as a secondary transfer standard.
  • Bidirectional flow calibration, enables full-scale readings in both flow directions.
  • Integrated flow totalizer, provides cumulative readings of total quantity flowed over time.
  • Backlit color display, shines in low lighting with 5 hours of continuous operation on a single charge.

View other available instrument options here.

LB Liquid Flow Series

Verify liquid processes with the fastest response time available in a liquid flow meter (20 ms). Available in ranges to 0-10 lpm. Click here for more information about our Liquid Flow Series.

Download MB SpecsDownload MWB SpecsDownload MBS Specs

  • Available ranges: any full-scale range from 0-0.5 sccm to 0-4000 slpm
  • Linear range: 0.5-100% of full scale, 200:1 turndown (MB and MWB) or 1-100% of full scale, 100:1 turndown (MBS)
  • Accuracy (NIST-traceable): +/- (0.8% of the reading + 0.2% of the full-scale range)
    • Optional high-accuracy calibration of +/- (0.4% of the reading + 0.2% of the full-scale range)
  • Response time: less than 10 ms
  • Pressure drop: 1-9 psi at full scale (MB and MBS) or 0.06-0.69 psi at full scale (MWB), depending upon flow range
  • Multi-gas calibration: up to 130 Gas Select™ gases preloaded, includes COMPOSER™ custom gas composition software.
  • Digital (RS-232) and analog outputs (0-5v, 1-5v, 0-10v, 4-20 mA)
  • Simultaneous real-time readings of mass flow, volumetric flow, absolute pressure and temperature
  • Display: 2.1″ monochrome LCD digital display with touch pad interface
    • Optional 2.1″ backlit color TFT digital display with touch pad interface
  • Battery: rechargeable Li-ion (1880 mAh)
  • Charging options: any USB power source via included cable and AC adapter; 8-pin mini-DIN
  • Maximum inlet pressure: 145 psig (MB and MBS) or 50 psig (MWB)
  • Lifetime warranty: unaffected by bumps, humidity or changes in orientation

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 Gases
Bioreactor Gas Mixes
Pure Corrosives
• Acetylene (C2H2)
• Air
• Argon (Ar)
• i-Butane (i-C4H10)
• n-Butane (n-C4H10)
• Carbon dioxide (CO2)
• Carbon monoxide (CO)
• Deuterium (D2)
• Ethane (C2H6)
• Ethylene/Ethene (C2H4)
• Helium (He)
• Hydrogen (H2)
• Krypton (Kr)
• Methane (CH4)
• Neon (Ne)
• Nitrogen (N2)
• Nitrous Oxide (N2O)
• Oxygen (O2)
• Propane (C3H8)
• Sulfur Hexafluoride (SF6)
• Xenon (Xe)
• 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 (NH3)
• Butylene (1-Butene)
• Cis-Butene (cis-2-Butene)
• Iso-Butene
• Trans-Butene
• Carbonyl Sulfide (COS)
• Chlorine (Cl2), *meters only
• Dimethylether (CH3OCH3)
• Hydrogen Sulfide (H2S)
• Nitrogen Trifluoride (NF3)
• Nitric Oxide (NO)
• Propylene (C3H6)
• Silane (SiH4)
• Sulfur Dioxide (SO2), *meters only
Breathing Gases Fuel Gas Mixes Refrigerants
• EAN-32 (32% O2+68% N2)
• EAN-36 (36% O2+64% N2)
• EAN-40 (40% O2+60% N2)
• EA-40 (40% O2+60% Air)
• EA-60 (60% O2+40% Air)
• EA-80 (80% O2+20% Air)
• Heliox-20 (20% O2+80% He)
• Heliox-21 (21% O2+79% He)
• Heliox-30 (30% O2+70% He)
• Heliox-40 (40% O2+60% He)
• Heliox-50 (50% O2+50% He)
• Heliox-60 (60% O2+40% He)
• Heliox-80 (80% O2+20% He)
• Heliox-99 (99% O2+1% He)
• Metabolic Exhalant (16% O2+78.04% N2+5% CO2+0.96% Ar)
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 Trichlorofluoromethane (CCl3F)
• R-14 Tetrafluoromethane (CF4)
• R-22 Difluoromonochloromethane (CHClF2)
• R-23 Trifluoromethane (CHF3)
• R-32 Difluoromethane (CH2F2)
• R-115 Chloropentafluoroethane (C2ClF5)
• R-116 Hexafluoroethane (C2F6)
• R-124 Chlorotetrafluoroethane (C2HClF4)
• R-125 Pentafluoroethane (C2HF5)
• R-134A Tetrafluoroethane (CH2FCF3)
• R-142B Chlorodifluoroethane (CH3CClF2)
• R-143A Trifluoroethane (C2H3F3)
• R-152A Difluoroethane (C2H4F2)
• RC-318 Octafluorocyclobutane (C4F8)
• R-404A (44% R-125+4% R-134A+52% R-143A)
• R-407C (22% R-32+25% R-125+52% R-134A)
• R-410A (50% R-32+50% R-125)
• R-507A (50% R-125+50% R-143A)
Chromatography Gases Oxygen Concentrator Gas Mixes
• P-5 (5% CH4+95% Ar)
• P-10 (10% CH4+90% Ar)
• 89% O2+7% N2+4% Ar
• 93% O2+3% N2+4% Ar
• 95% O2+1% N2+4% Ar
Welding Gases Stack/Flue Gas Mixes Laser Gas Mixes
• C-2 (2% CO2+98% Ar)
• C-8 (8% CO2+92% Ar)
• C-10 (10% CO2+90% Ar)
• C-15 (15% CO2+85% Ar)
• C-20 (20% CO2+80% Ar)
• C-25 (25% CO2+75% Ar)
• C-50 (50% CO2+50% Ar)
• C-75 (75% CO2+25% Ar)
• He-25 (25% He+75% Ar)
• He-50 (50% He+50% Ar)
• He-75 (75% He+25% Ar)
• He-90 (90% He+10% Ar)
• A1025 (90% He+7.5% Ar+2.5% CO2)
• Stargon CS (90% Ar+8% CO2+2% O2)
• 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

Ask Alicat: What is the fastest way to validate flow rates?

Alicat Scientific’s rechargeable mass flow meters deliver laboratory-class accuracy in a handheld instrument that lasts 18 hours on a single charge.

Ask Alicat: How tough is an Alicat flow meter? (Drop Test)

We drop an Alicat portable mass flow meter onto unforgiving concrete from increasing heights to test the toughness of this product. After each drop, we compare its measurement to the pre-test baseline.

Ask Alicat: What Is Pressure Drop?

Pressure drop is the amount of line pressure that is permanently lost as gas passes through an instrument in a gas line. Alicat Scientific demonstrates the importance of pressure drop for gas flow processes and shows how you can greatly reduce pressure drop by using its Whisper Series of mass flow instruments.


Alicat portable mass flow calibrator with optional backlit color display

Alicat Whisper-series portable flow calibrator, shown with optional backlit color display.

Alicat portable flow calibrators feature easy USB charging.

Alicat portable flow calibrators feature easy USB charging.

Alicat's new rechargeable portable mass flow meter

Alicat Whisper-series portable flow calibrator, shown with standard monochrome display.

Alicat portable flow calibrators come with micro-USB AC adapters.

Alicat portable flow calibrators come with micro-USB AC adapters.

Alicat Portable Calibration Unit

Alicat Portable Calibration Unit

In the Box

Compatible Accessories:


Please contact one of our Alicat representatives for current pricing and quoting for your region, or email us to discuss your application with an Alicat sales engineer.

In-House Flow Verification for a Gas Chromatograph

Verify the proper operation of flowing processes in real time. Simultaneous flow and pressure readings improve validation efficiency. Accurate, and repeatable measurements exceed the reporting standards of external auditors.
See the full app note here.

Verification of a gas chromatograph using an Alicat portable flow calibrator

Verification of a gas chromatograph using an Alicat portable flow calibrator

Calibration of an Air Sampling Canister

Rapidly calibrate across multiple ranges and gases without carrying a computer. NIST-traceable high-accuracy calibration makes your portable a transfer standard. “Whisper” low pressure drop enables non-intrusive volumetric flow calibration.
See the full app note here.

Calibration of an air sampling canister using an Alicat portable flow calibrator

Calibration of an air sampling canister using an Alicat portable flow calibrator