Portable gas flow standards
Pressure based mass flow instrumentation for top performance. Portable flow meters make system checks, calibrations and audits fast and easy. All portable flow instruments offer laboratory-grade accuracy and multivariate readings that update 1000 times a second.
- 0.6% of reading accuracy on most flow instruments
- 4 ms response time
- No warm up
- Four process variables
- Built in display
- Industrial protocols
- Pressure compensation
- Temperature compensation
- Wide dynamic flow ranges
The AFS is a transfer standard that features our highest accuracy calibration, humidity compensation, averaged readings and onboard data logging. Our FP-25 is a weatherproof version of the AFS that is designed for outdoor calibration of particulate matter (PM) ambient air samplers.
The MB series is suitable for most flow measurement applications, with models that can measure flow rates as high as 5000 slpm or as low as 0.0025 sccm. Choose an MBQ when your line pressures are high (145-305 psig). The MWB series is best for low pressure drop applications and for reducing pneumatic response time at flow rates of 50 scccm or less.
Alicat’s PCU is a portable transfer standard that combines up to three individual flow meters for a very wide usable range. Choose a PCU when the range of a single flow meter isn’t enough for your calibration needs.
See product brochures for full specifications
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AFS–Portable Gas Flow Calibrators
A portable gas flow standard that is ready for anything
When your calibration process requires the utmost accuracy, the AFS flow standard delivers. It features Alicat’s most advanced calibration for optimal performance across changing temperatures, plus an on-board relative humidity sensor to maintain its accuracy all the way up to 100% RH (non-condensing). These advancements make possible a 1% of reading accuracy spec that requires no additional full-scale component.
- Accurate. Calibrate flows with NIST-traceable 0.75% of reading accuracy for a variety of gases, or define your own gas composition with COMPOSER™. Low pressure drop allows calibration of volumetric flow rates with minimal impact.
- Fast & Easy Operation. Averaged measurements and onboard data logging make it easy to gather multivariate flow data (volumetric and standardized flow rates, ambient and line pressures, and line temperature).
- Durable. AFS flow standards are designed to be carried and can withstand drops if they should occur. Process connections have SAE threads for superior leak prevention.
AFS-5 (0-5 sccm)
AFS-500 (0-500 sccm)
AFS-5000 (0-5 slpm)
AFS-20L (0-20 slpm)
AFS-50L (0-50 slpm)
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FP25 High Accuracy Calibration Device for Air Quality Monitoring
Accurate Air Flow Calibrations in Any Weather
Audit flow rate, pressure and temperature with laboratory-grade accuracy in an instrument that won’t break down. Alicat’s FP-25 and FP-25BT (with Bluetooth) flow standards calibrate every low-volume particulate air sampler on your deck. All-weather accuracy and durability ensure consistent readings, no matter the wind, temperature or humidity.
- All-Weather Accuracy. Be confident in your flow measurements, no matter the weather. Responsive temp probes and humidity sensors keep the weather in check as you monitor flow, pressure and temperature in real time. Or, collect a robust average of 5000 readings in 5 seconds.
- Fast & Easy Operation. Climb ladders less with Bluetooth connectivity (FP-25BT only). Connect quickly to any low-volume sampler with the industry’s only pass-through PM10/PM2.5 inlet connection. Or use the included barb fitting with face seal for no-hassle fitting changes. Rapid temperature equilibration lets you get started right away.
- Durable Field Design. Keep calibrating after a drop from the roof, or finish your audit if it starts to rain. This compact calibrator fits in your pocket but is built tough with an all-aluminum body, weather-resistant connections and the industry’s only lifetime warranty.
In the box
- FP-25 flow calibrator
- External temperature probe with 6 ft of cable and locking M8 connector
- Bluetooth antenna with threaded SMA connector (FP-25BT only)
- Micro-USB to USB cable for charging and communications
- USB wall adapter for charging
- 1/4″ NPT barb adapter (1/4″ barb) with face seal
- 1/4″ NPT fittings with face seals for pass-through connection to 1-1/4″ OD air sampler downtubes
- NIST-traceable calibration certificate
- Operating manual
- Custom-fit hard case
Alicat FP-25 flow calibrator kit contents
Flow Calibrating a Met One BAM 1020/1022 FEM Sampler
Alicat FP-25 flow calibrating a rooftop Met One BAM 1020/1022 FEM air sampler
Method 1: Direct Mode
Direct Mode connects the Alicat FP-25 directly to your sampler’s downtube. The pass-through connection most closely replicates sampler operating conditions. The low pressure drop of the Alicat ensures that it is virtually invisible to your air sampler.
- Thread the Direct Mode downtube adapter into the outlet of the FP-25 until its face seal is tight against the flow body.
- Thread the Direct Mode PM inlet adapter into the inlet of the FP-25 until its face seal is tight against the flow body.
- Fit the FP-25 onto the BAM downtube, and place the PM10 inlet on top of the FP-25. If using a PM2.5 cyclone, leave it in place, and fit the FP-25 between it and the PM10 inlet.
- Insert the FP-25 external temperature probe into the sampler’s radiation shield.
- Be sure to tare the Alicat FP-25 before you begin the BAM 1020 or BAM 1022 flow calibration.
Alicat FP-25 flow calibrating a rooftop Met One BAM 1020/1022 FEM air sampler
Method 2: Standard Mode
Standard Mode connects the FP-25 to any air sampler by means of a hose barb and silicone tubing. FRM and FEM samplers will use their flow audit adapters for this setup.
- Thread the barb fitting into the outlet of the FP-25 until its face seal is tight against the flow body.
- Push the silicone tubing onto the barb.
- Fit the other end of the tubing onto the barb of the BAM flow audit adapter.
- Place the flow audit adapter onto the top of the BAM downtube, or the PM2.5 cyclone if you are using one.
- Insert the FP-25 external temperature probe into the sampler’s radiation shield.
- Be sure to tare the Alicat FP-25 before you begin the BAM 1020 or BAM 1022 flow calibration.
Alicat FP-25 leak checking a Met One BAM 1020/1022 FEM air sampler
Pressure Monitoring During External Leak Checks
The pass-through setup (Direct Mode) can also be used to provide pressure monitoring during leak check procedures. During the leak check, monitor internal pressure with absolute or gauge reference in the engineering unit of your choosing.
- Thread the Direct Mode downtube adapter into the outlet of the FP-25 until its face seal is tight against the flow body.
- Thread the Direct Mode PM inlet adapter into the inlet of the FP-25 until its face seal is tight against the flow body.
- Fit the FP-25 onto the BAM downtube.
- Fit the leak check adapter onto the PM inlet adapter of the FP-25.
- Select gauge or absolute pressure on the FP-25 to monitor sampler pressure during the leak check.
Flow Calibrating a Met One SASS or Super SASS Speciation Sampler
Alicat FP-25 flow calibrating a Met One SASS
- Thread the barb fitting into the outlet of the FP-25 until its face seal is tight against the flow body.
- Push the silicone tubing onto the barb.
- Connect the other end of the tubing to the inlet tube of the canister’s sharp cut cyclone (SCC).
- Insert the FP-25 external temperature probe into the SASS radiation shield.
- Be sure to tare the Alicat FP-25 before you begin the SASS flow calibration.
Alicat FP-25 flow calibrating a Met One SASS
Flow Calibrating a Partisol/Thermo Scientific PM10 FRM Sampler
Alicat FP-25 flow calibrating a Thermo Scientific Partisol 2000 FRM air sampler
Method 1: Direct Mode
Direct Mode connects the Alicat FP-25 directly to your sampler’s downtube. The pass-through connection most closely replicates sampler operating conditions. The low pressure drop of the Alicat ensures that it is virtually invisible to your air sampler.
- Thread the Direct Mode downtube adapter into the outlet of the FP-25 until its face seal is tight against the flow body.
- Thread the Direct Mode PM inlet adapter into the inlet of the FP-25 until its face seal is tight against the flow body.
- Fit the FP-25 onto the Partisol downtube, and place the PM10 inlet on top of the FP-25.
- Insert the FP-25 external temperature probe into the sampler’s radiation shield.
- Be sure to tare the Alicat FP-25 before you begin the Partisol flow calibration.
Alicat FP-25 flow calibrating a Thermo Scientific Partisol 2000 FRM air sampler
Method 2: Standard Mode
Standard Mode connects the FP-25 to any air sampler by means of a hose barb and silicone tubing. FRM and FEM samplers will use their flow audit adapters for this setup.
- Thread the barb fitting into the outlet of the FP-25 until its face seal is tight against the flow body.
- Push the silicone tubing onto the barb.
- Fit the other end of the tubing onto the barb of the Partisol flow audit adapter.
- Place the flow audit adapter onto the top of the Partisol downtube.
- Insert the FP-25 external temperature probe into the sampler’s radiation shield.
- Be sure to tare the Alicat FP-25 before you begin the Partisol flow calibration.
Alicat FP-25 leak checking a Thermo Scientific Partisol 2000 FRM air sampler
Pressure Monitoring During External Leak Checks
The pass-through setup (Direct Mode) can also be used to provide pressure monitoring during leak check procedures. During the leak check, monitor internal pressure with absolute or gauge reference in the engineering unit of your choosing.
- Thread the Direct Mode downtube adapter into the outlet of the FP-25 until its face seal is tight against the flow body.
- Thread the Direct Mode PM inlet adapter into the inlet of the FP-25 until its face seal is tight against the flow body.
- Fit the FP-25 onto the Partisol downtube.
- Fit the leak check adapter onto the PM inlet adapter of the FP-25.
- Select gauge or absolute pressure on the FP-25 to monitor sampler pressure during the leak check.
Flow Calibrating a Thermo 2025i PM10/PM2.5 FRM Sampler
Alicat FP-25 flow calibrating a Thermo Scientific 2025i FRM air sampler
Method 1: Direct Mode
Direct Mode connects the Alicat FP-25 directly to your sampler’s downtube. The pass-through connection most closely replicates sampler operating conditions. The low pressure drop of the Alicat ensures that it is virtually invisible to your air sampler.
- Thread the Direct Mode downtube adapter into the outlet of the FP-25 until its face seal is tight against the flow body.
- Thread the Direct Mode PM inlet adapter into the inlet of the FP-25 until its face seal is tight against the flow body.
- Fit the FP-25 onto the 2025i downtube, and place the PM10 inlet on top of the FP-25.
- Insert the FP-25 external temperature probe into the sampler’s radiation shield.
- Be sure to tare the Alicat FP-25 before you begin the Thermo 2025i flow calibration.
Alicat FP-25 flow calibrating a Thermo Scientific 2025i FRM air sampler
Method 2: Standard Mode
Standard Mode connects the FP-25 to any air sampler by means of a hose barb and silicone tubing. FRM and FEM samplers will use their flow audit adapters for this setup.
- Thread the barb fitting into the outlet of the FP-25 until its face seal is tight against the flow body.
- Push the silicone tubing onto the barb.
- Fit the other end of the tubing onto the barb of the 2025i flow audit adapter.
- Place the flow audit adapter onto the top of the 2025i downtube.
- Insert the FP-25 external temperature probe into the sampler’s radiation shield.
- Be sure to tare the Alicat FP-25 before you begin the Thermo 2025i flow calibration.
Alicat FP-25 leak checking a Thermo Scientific 2025i FRM air sampler
Pressure Monitoring During External Leak Checks
The pass-through setup (Direct Mode) can also be used to provide pressure monitoring during leak check procedures. During the leak check, monitor internal pressure with absolute or gauge reference in the engineering unit of your choosing.
- Thread the Direct Mode downtube adapter into the outlet of the FP-25 until its face seal is tight against the flow body.
- Thread the Direct Mode PM inlet adapter into the inlet of the FP-25 until its face seal is tight against the flow body.
- Fit the FP-25 onto the 2025i downtube.
- Fit the leak check adapter onto the PM inlet adapter of the FP-25.
- Select gauge or absolute pressure on the FP-25 to monitor sampler pressure during the leak check.
Flow Calibrating a URG-3000 Carbon Speciation Sampler
Alicat FP-25 flow calibrating a URG-3000 carbon sampler
Method 1: Direct Mode
Direct Mode connects the Alicat FP-25 directly to your sampler’s downtube. The pass-through connection most closely replicates sampler operating conditions. The low pressure drop of the Alicat ensures that it is virtually invisible to your air sampler.
- Thread the Direct Mode downtube adapter into the outlet of the FP-25 until its face seal is tight against the flow body.
- Connect the FP-25 to the URG downtube reducer, and place the assembly onto the top of the URG-3000 downtube.
- The URG-3000 temperature sensor is located at the bottom of its Module C box. Place the FP-25 external temperature probe near this location.
- Be sure to tare the Alicat FP-25 before you begin the URG flow calibration.
Alicat FP-25 flow calibrating a URG-3000 carbon sampler
Method 2: Standard Mode
Standard Mode connects the FP-25 to any air sampler by means of a hose barb and silicone tubing. FRM and FEM samplers will use their flow audit adapters for this setup.
- Thread the barb fitting into the outlet of the FP-25 until its face seal is tight against the flow body.
- Push the silicone tubing onto the barb.
- Fit the other end of the tubing onto the barb of the URG flow audit adapter.
- Connect the flow audit adapter to the URG downtube reducer, and place the assembly onto the top of the URG-3000 downtube.
- The URG-3000 temperature sensor is located at the bottom of its Module C box. Place the FP-25 external temperature probe near this location.
- Be sure to tare the Alicat FP-25 before you begin the URG flow calibration.
Alicat FP-25 flow calibrating a URG-3000 carbon sampler
Pressure Monitoring During External Leak Checks
The pass-through setup (Direct Mode) can also be used to provide pressure monitoring during leak check procedures. During the leak check, monitor internal pressure with absolute or gauge reference in the engineering unit of your choosing.
- Thread the Direct Mode downtube adapter into the outlet of the FP-25 until its face seal is tight against the flow body.
- Thread the Direct Mode PM inlet adapter into the inlet of the FP-25 until its face seal is tight against the flow body.
- Connect the FP-25 to the URG downtube reducer, and place the assembly onto the top of the URG-3000 downtube.
- Fit the URG leak check adapter onto the PM inlet adapter of the FP-25.
- Select gauge or absolute pressure on the FP-25 to monitor sampler pressure during the leak check.
FP-25 (FP-25 kit with accessories and hard case) FP25
FP-25BT (FP-25 kit with Bluetooth antenna) FP25BT
Accessories
FP-PROBE (replacement external temperature probe)
FP-DMA1 (replacement Direct Mode inlet adapter with face seal)
FP-DMA2 (replacement Direct Mode outlet adapter with face seal)
FP-BARB (replacement barb adapter with face seal)
FP-TUBE (replacement tubing for barb connections)
FP-BTA (replacement Bluetooth antenna, compatible with FP-25BT only)
PVPS5USBU (replacement micro-USB cable and wall adapter)
SCASE (replacement hard case with custom foam inserts for FP-25 and FP-25BT)
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MB–Portable Gas Mass Flow Meters
Laboratory-grade flow verification, anywhere you need it
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. Instant-on and real-time readings for multiple gases across wide flow ranges let you get in and out quickly.
- Accurate. Calibrate flows with NIST-traceable accuracy for a variety of gases down to 1/200th of full scale, or define your own gas composition with COMPOSER™.
- Efficient. As soon as you power the MB on, it’s ready to display live flow, pressure and temperature readings in your choice of engineering units.
- Tough. MB series portable flow meters are designed to be carried and can withstand drops if they should occur.
Alicat’s MB series is suitable for use with non-corrosive gases.
MB-0.5SCCM-D
MB-1SCCM-D
MB-2SCCM-D
MB-5SCCM-D
MB-10SCCM-D
MB-20SCCM-D
MB-50SCCM-D
MB-100SCCM-D
MB-200SCCM-D
MB-500SCCM-D
MB-1SLPM-D
MB-2SLPM-D
MB-5SLPM-D
MB-10SLPM-D
MB-20SLPM-D
MB-50SLPM-D
MB-100SLPM-D
MB-250SLPM-D
MB-500SLPM-D
MB-1000SLPM-D
MB-1500SLPM-D
MB-2000SLPM-D
MB-3000SLPM-D
MB-5000SLPM-D
Alicat’s MBS series is suitable for use with corrosive gases.
MBS-0.5SCCM-D
MBS-1SCCM-D
MBS-2SCCM-D
MBS-5SCCM-D
MBS-10SCCM-D
MBS-20SCCM-D
MBS-50SCCM-D
MBS-100SCCM-D
MBS-200SCCM-D
MBS-500SCCM-D
MBS-1SLPM-D
MBS-2SLPM-D
MBS-5SLPM-D
MBS-10SLPM-D
MBS-20SLPM-D
MBS-50SLPM-D
MBS-100SLPM-D
MBS-250SLPM-D
MBS-500SLPM-D
MBS-1000SLPM-D
MBS-1500SLPM-D
MBS-2000SLPM-D
MBS-3000SLPM-D
MBS-5000SLPM-D
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MWB–Low Pressure Drop Portable Gas Mass Flow Meters
Measure flow with minimal system impact, anywhere you need it
“Whisper” series portable flow meters with low pressure drop are the perfect calibration instruments for mass and volumetric flow rates. Low pressure drop minimizes system impact, enabling flow measurement at near-atmospheric pressures or when there is little available system pressure.
- Accurate. Calibrate flows with NIST-traceable accuracy for a variety of gases down to 1/200th of full scale, or define your own gas composition with COMPOSER™.
- Efficient. As soon as you power the MWB on, it’s ready to display live flow, pressure and temperature readings in your choice of engineering units.
- Tough. MWB series portable flow meters are designed to be carried and can withstand drops if they should occur.
Alicat’s MWB series is suitable for use with non-corrosive gases.
MWB-0.5SCCM-D
MWB-1SCCM-D
MWB-2SCCM-D
MWB-5SCCM-D
MWB-10SCCM-D
MWB-20SCCM-D
MWB-50SCCM-D
MWB-100SCCM-D
MWB-200SCCM-D
MWB-500SCCM-D
MWB-1SLPM-D
MWB-2SLPM-D
MWB-5SLPM-D
MWB-10SLPM-D
MWB-20SLPM-D
MWB-40SLPM-D
MWB-50SLPM-D
MWB-100SLPM-D
MWB-250SLPM-D
MWB-500SLPM-D
MWB-1000SLPM-D
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MBQ–High Pressure Portable Gas Mass Flow Meters
High-pressure flow verification, anywhere you need it
The versatile MBQ portable flow meter reduces the time it takes to verify or validate flows that are operating at high pressures (160-320 psia). Instant-on and real-time readings for multiple gases reduce the downtime and disruption to your process.
- Accurate. Calibrate flows with NIST-traceable accuracy for a variety of gases down to 1/50th of full scale, or define your own gas composition with COMPOSER™.
- Efficient. As soon as you power the MBQ on, it’s ready to display live flow, pressure and temperature readings in your choice of engineering units.
- Tough. MBQ series portable flow meters are designed to be carried and can withstand drops if they should occur.
Alicat’s MBQ series is suitable for use with non-corrosive gases.
MBQ-10SCCM-D
MBQ-20SCCM-D
MBQ-50SCCM-D
MBQ-100SCCM-D
MBQ-200SCCM-D
MBQ-500SCCM-D
MBQ-1SLPM-D
MBQ-2SLPM-D
MBQ-5SLPM-D
MBQ-10SLPM-D
MBQ-20SLPM-D
MBQ-50SLPM-D
MBQ-100SLPM-D
MBQ-250SLPM-D
MBQ-500SLPM-D
MBQ-1000SLPM-D
MBQ-1500SLPM-D
MBQ-2000SLPM-D
MBQ-3000SLPM-D
MBQ-5000SLPM-D
Alicat’s MBQS series is suitable for use with corrosive gases.
MBQS-10SCCM-D
MBQS-20SCCM-D
MBQS-50SCCM-D
MBQS-100SCCM-D
MBQS-200SCCM-D
MBQS-500SCCM-D
MBQS-1SLPM-D
MBQS-2SLPM-D
MBQS-5SLPM-D
MBQS-10SLPM-D
MBQS-20SLPM-D
MBQS-50SLPM-D
MBQS-100SLPM-D
MBQS-250SLPM-D
MBQS-500SLPM-D
MBQS-1000SLPM-D
MBQS-1500SLPM-D
MBQS-2000SLPM-D
MBQS-3000SLPM-D
MBQS-5000SLPM-D
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PCU–Gas Flow Portable Calibration Unit
Portable flow calibration with a very wide dynamic range
When a single flow meter won’t cover all of your calibration needs, consider using a portable calibration unit (PCU). Alicat’s PCU is a secondary calibration standard that combines up to 3 high-accuracy flow meters of varied ranges (max 1500 slpm) with totalizers into a rugged industrial carrying case for go-anywhere portability. PCU’s can be powered by two 9-volt batteries or the included AC cable and include a copy of Alicat’s Flow Vision SC™ software.
- Versatile. Quickly calibrate multiple instruments across a combined turndown range of up to 1,000,000:1 (for example 1 sccm – 1000 slpm) with easy push-connect fittings or optional compression fittings.
- Accurate. Measure live flow rates and flow totals with NIST-traceable accuracy (0.4% reading + 0.2% full-scale range) for a variety of gases down to 1/200th of full scale, or define your own gas composition with COMPOSER™.
- Rugged. The PCU houses the flow meters within a rugged hard case and can withstand drops if they should occur.
PCU’s are also available in our “Whisper” configuration with low pressure drop (PCUW series) and 316L configuration for use with corrosive gases (PCUS series).
Part numbers below are just a few examples of PCU range combinations. Any 3 flow meters with ranges up to 1500 slpm may be included in a standard PCU. Alicat’s PCU series is suitable for use with non-corrosive gases.
PCU-0.5SCCM-10SCCM-1SLPM
PCU-10SCCM-500SCCM-20SLPM
PCU-100SCCM-2SLPM-20SLPM
PCU-100SCCM-10SLPM-100SLPM
PCU-100SCCM-50SLPM-500SLPM
PCU-10SLPM-50SLPM-1500SLPM
Part numbers below are just a few examples of PCU range combinations. Any 3 flow meters with ranges up to 1500 slpm may be included in a PCUS. Alicat’s PCUS series is suitable for use with corrosive gases.
PCUS-0.5SCCM-10SCCM-1SLPM
PCUS-10SCCM-500SCCM-20SLPM
PCUS-100SCCM-2SLPM-20SLPM
PCUS-100SCCM-10SLPM-100SLPM
PCUS-100SCCM-50SLPM-500SLPM
PCUS-10SLPM-50SLPM-1500SLPM
Part numbers below are just a few examples of PCU range combinations. Any 3 flow meters with ranges up to 250 slpm may be included in a PCUW. Alicat’s PCUW series is suitable for use with non-corrosive gases.
PCUW-0.5SCCM-10SCCM-1SLPM
PCUW-10SCCM-500SCCM-20SLPM
PCUW-100SCCM-2SLPM-20SLPM
PCUW-100SCCM-10SLPM-100SLPM
PCUW-100SCCM-50SLPM-250SLPM
PCUW-10SLPM-50SLPM-250SLPM
