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Flow Meters

A flow meter is a device that measures flow. Flow measurement is the quantification of bulk fluid movement (liquid or gas). Flow can be measured in a variety of ways.

Mechanical (Positive-displacement) flowmeters are best compared to a bucket and a stopwatch. The stopwatch is started when the flow starts, and stopped when the bucket reaches its limit. The volume divided by time gives the flow rate.

Pressure-based Meters rely on Bernoulli’s principle to derive the dynamic pressure. Optical flowmeters use light to determine flow rate. A direct measurement of mass flow can be obtained with Coriolis flow meters. These flowmeters use the Coriolis effect that causes a laterally vibrating tube to distort to measure mass flow.

If you’re doing gas chromatography, you must routinely measure gas flows when setting up an instrument, developing a method, or troubleshooting. Modern GCs rely on electronic pressure control (EPC) for setting flow rates. However, a flowmeter is still an essential tool to have- especially while troubleshooting. Also, many older GCs that are still in use don’t have EPC, which requires manually setting flows with a flowmeter.

Types of Flowmeters

There are generally two types of gas flowmeters- volumetric and mass. Both types measure the amount of gas exiting a column or split vent in a specific time period. If the amount of gas is measured in units of volume, the flow rate is volumetric based. The most common device for measuring a volumetric flow rate is a bubble flowmeter. If the amount of gas is measured in units of mass, the flow rate is mass based. The most common device for measuring mass flow is a thermal flowmeter (more commonly called mass flowmeter).

Top Flowmeter Manufacturers

HiTechTrader offers a variety of flow meters to meet your flow measurement needs. Hewlett Packard, Humonics, Brooks Instruments, Kobold, Sensus, and ISCO are all excellent manufacturers.

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13675 - Gasmet Gas Flow Meter
8405 - I2R WFM/1800
Number of Items: 45

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002180807

Precision Wet-Test Flow Meter

    Price: $350.00    

 Wet-Test Flow Meter. Measures the flow of gas and total flow of gas. All stainless steel construction. 1 liter/revolution.

... More Info

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001170221

Mega Systems and Chemicals Photoelectric Liquid Sensor model TK-010

    Price: $25.00    POD Price: $25.00    
Mega Systems model TK-010 Photoelectric Liquid Sensor model TK-010. 24v DC.


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001160620

Sierra Instruments Mass Flow Controller

    Price: $169.00    POD Price: $150.00    
Sierra Instruments Side Trak Mass Flow Controller. Gas: SiH4, Units: SCCM, Range: 0-100. 500 psi max.  Input: +/- 15 VDC' Output: 0-5 VDC.


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002160504

Brooks Instruments Mass Flow Meter model 5811B

    Price: $299.00    POD Price: $250.00    
Brooks Mass Flow Meter model 5811B. CO2. Range; 0-20 SLPM. 1500 PSIG at 150 F.


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002151230

Kobold DF-K 4405 Paddle Wheel Flowmeter

    Price: $798.00    POD Price: $499.00    

Kobold Series DF-K Paddle Wheel Flowmeter With Analog Output Model DF-4405BS2DR0095.  Range .05 - 12 lpm,  fitting size 1/2 inch, max pressure 230 PSI,  4- 20 mA output.  The DF is a compact flow sensor which employs permanent magnets embedded in a rotating paddle wheel. 

... More Info

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001151230

Kobold DF-K Paddle Wheel Flowmeter 4406

    Price: $798.00    POD Price: $499.00    

Kobold Series DF-K Paddle Wheel Flowmeter With Analog Output Model DF-4406BS2DR0095.  Range 1 - 24 lpm,  fitting size 1/2 inch, max pressure 230 PSI,  4- 20 mA output.  The DF is a compact flow sensor which employs permanent magnets embedded in a rotating paddle wheel. 

... More Info

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001140827

Precision Wet-Test Flow Meter

    Price: $1,749.00    POD Price: $1,500.00    

Precision Scientific Wet-Test Flow Meter. Measures the flow of gas and total flow of gas. All stainless steel construction. 3 liter/revolution.

... More Info

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002140725

J and W Scientific Digital Flowmeter

    Price: $599.00    POD Price: $480.00    

J&W Scientific Digital Flowmeter, measured in L/min. Verify mass flow controller settings, or monitor higher gasflow rates. Runs on 9 volt battery.



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004131101

Cole Parmer Rotometer

    Price: $44.00    POD Price: $25.00    

Cole Parmer Flowmeter 0 to 65 mm.



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001131028

Humonics Optiflow 520 Digital Flowmeter

    Price: $499.00    POD Price: $250.00    

Humonics Optiflow 520 Digital Flowmeter. Flow rate 0.5-500 ml/min. Powered by 9v battery.

Flowmeter model                 Flow                                          Resolution              Accuracy
Optiflow  420                          0.10–9.99 mL/min           0.01 mL/min                         ±3%
                                                  10.0–50.0 mL/min            0.1 mL/min
 
Optiflow 570/570 Mobile       0.500–1.999 mL/min     0.004 mL/min                      ±3%
                                                  2.00–9.99 mL/min             0.01 mL/min
                                                 10.0–99.9 mL/min                0.1 mL/min
                                                 100–700 mL/min                   1 mL/min
 
Optiflow 650/650 Mobile       5.0–99.9 mL/min                0.1 mL/min                       ±2%
                                                  0.100–0.999 L/min              0.001 L/min
                                                 1.00–5.00 L/min                    0.01 L/min
... More Info

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008131025

Humonics 1000 Digital Flow meter

    Price: $749.00    POD Price: $600.00    

Digital Flow meter Humonics

Humonics 1000 Digital Flow meter, flow rate 1-30 mL/min. A microcomputer and infrared optics are used to track a rising volume of liquid within a tube of precision-bore glass. Absolute accuracy is established by comparing the performance of the instrument to an NIST-registered burette.

... More Info

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004131024

Organomation Assoc. Polycarbonate Flowmeter LPM Air

    Price: $49.00    POD Price: $50.00    

Organomation Assoc. Polycarbonate Flowmeter, 1-10 LPM, Air, w/ Valve.



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001130906

I2R Water Flow Monitor Model VVWF/1800

    Price: $99.00    POD Price: $35.00    

I2R Water Flow Monitor Model VVWF/1800, with variable voltage Capacity 1800 watts



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002130419

Laserflo Blood Perfusion Monitor BPM 403 A

    Price: $649.00    POD Price: $250.00    

Laserflo Blood Perfusion Monitor BPM 403 A. A cardiovascular blood flowmeter is a device that is connected to a flow transducer that energizes the transducer and processes and displays the blood flow signal. 120v, 50/60 Hz,1 amp.

 

... More Info

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006130402

Tylan Mass Flow Controller Model FC-280

    Price: $299.00    POD Price: $250.00    

Tylan Mass Flow Controller Model FC-280. Flow Rate 10 SLPM of O2, Eliminates air convection currents inside its case without sacrificing response speed. Can be mounted in any position without requiring zero adjustment. Assures accuracy over the entire range of mass flow controller. Easily removed for range changes. Completely compatible with reactive and corrosive materials. Design eliminates internal dead volumes. Eliminates the need for complex, interactive multi-point linearisation during calibration.

... More Info

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005130402

Brooks Quantim Thermal Flow Meter

    Price: $2,499.00    POD Price: $1,000.00    

Brooks Instruments Quantim Coriolis mass flow meter/controller, Model Number QMAC003KDA1CDMCDABAFA0A

Most accurate measurement and control for very low-flow applications.

Flow Range (Full Scale Capacity)  13,500 gm/hr (Water @ 1 bar pressure drop), 27,000 gm/hr (maximum)

Can be used for liquids and gas. Hardware configuration. Valve: NC, seat: Kalrez, Seal: Nickel/Kalrez, fitting 1/8"VCR to 1/4"swagelok. Orfice: 0.007". Software DSP firmware 1.06, Application XB04. set point Parameter: mass Flow.

Can be calibrated for any type of liquid etc. Supports HART communication protocol. Revision #5. Hart 4-20 ma. Max flow 3000 gm/hr

... More Info

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004130402

Porter Instruments Co. LB-366

    Price: $199.00    POD Price: $50.00    

Mass Flow Meter/Controller, Max pressure 10500 psig, 200 SCCM, Gas: Nitrogen, P1:100-200 psig, P2:0-120 psig



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003130402

Porter Instruments Co. LB-366

    Price: $199.00    POD Price: $50.00    

Mass Flow Meter/Controller, Max pressure 1500 psig, 1000 SCCM, Gas: Methane, P1:60-150 psig, P2:0-120 psig



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002130402

Porter Instruments Co. LB-366

    Price: $199.00    POD Price: $50.00    

Mass Flow Meter/Controller, Max pressure 1500 psig, 500 SCCM, Gas: Oxygen, P1:60-150 psig, P2:0-120 psig



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004130401

Airco Rotameters

    Price: $149.00    POD Price: $100.00    

Bank of 4 Airco rotameters. Mounted on an aluminum plate with Whitey valves. Max pressure 250 psig.



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011130312

Brooks Instrument 0151E Mass Flow Controller Unit

    Price: $1,199.00    POD Price: $550.00    

Brooks Instrument 0151E Mass Flow Controller Unit. Digital display. 120 vac, 15w, 50/60 Hz.



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004130311

Brooks Instruments Quantim Flow Meter

    Price: $2,499.00    POD Price: $1,000.00    

Brooks Instruments Quantim Coriolis mass flow meter/controller, Model Number QMAC003KDA1CDMCDABAFA0A

Can be used for liquids and gas. Hardware configuration. Valve: NC, seat: Kalrez, Seal: Nickel/Kalrez, fitting 1/8"VCR to 1/4"swagelok. Orfice: 0.007". Software DSP firmware 1.06, Application XB04. set point Parameter: mass Flow.

Can be calibrated for any type of liquid etc. Supports HART communication protocol. Revision #5. Hart 4-20 ma. Max flow 3000 gm/hr

... More Info

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003130215

Equimeter Gas Meter Model S-275

    Price: $949.00    POD Price: $450.00    

Equimeter Gas Meter Model S-275. 3/4" NPT connections.  MAOP 5 psi. For measuring flow rates and total flow of dry gases.

One Rev.=.1 Cu. Ft.,  Temp Comp 60 degrees F Base,  MAOP 5 psi,  CL 250 ,  97-S CFH,  BUT. 135 - PROP. 155 - NAT. 250

 

... More Info

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005130110

Equimeter Gas Meter Model S-275

    Price: $949.00    POD Price: $450.00    

Equimeter Gas Meter Model S-275. 3/4" NPT connections.  For natural gas, butane, propane, air.  One Rev.=.1 Cu. Ft.  Temp Comp 60 degrees F Base MAOP 5 psi, CL 250,  88-S CFH,  BUT. 135 - PROP. 155 - NAT. 250

... More Info

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004130110

Sensus Gas Meter Model S-275

    Out of Stock    

Sensus Gas Meter Model S-275. 3/4" NPT connections.   For natural gas, butane, propane, air.  One Rev.=.1 Cu. Ft.,  Temp Comp 60 degrees F Base, MAOP 5 psi, CL 250 ,  11-W CFH. , BUT. 135 - PROP. 155 - NAT. 250

... More Info

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001120727

J-Kem Water Flow Monitor WFM 100

    Price: $249.00    POD Price: $125.00    

Precisely monitors the flow rate of water through a condenser, water bath, or other piece of equipment. If the flow rate falls below the minimum rate set by the user (i.e. loss of pressure, broken hose), power is turned off to the monitor’s output receptacle and any equipment plugged into it. Power remains off until manually reset.

... More Info

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005120307

Porter Carier Gas Flow Control Module

    Price: $249.00    POD Price: $125.00    

Controls Gas Flow to Two Collums in SCC/MIN. Has a Regulated Pressure Gauge



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013120124

Hewlett Packard Digital Flowmeter 9301 1004

    Price: $599.00    POD Price: $300.00    

Hewlett Packard Digital Flowmeter 9301-1004, measured in mL/min

 

Flowmeter model                 Flow                                          Resolution              Accuracy
Optiflow  420                          0.10–9.99 mL/min           0.01 mL/min                         ±3%
                                                  10.0–50.0 mL/min            0.1 mL/min
 
Optiflow 570/570 Mobile       0.500–1.999 mL/min     0.004 mL/min                      ±3%
                                                  2.00–9.99 mL/min             0.01 mL/min
                                                 10.0–99.9 mL/min                0.1 mL/min
                                                 100–700 mL/min                   1 mL/min
 
Optiflow 650/650 Mobile       5.0–99.9 mL/min                0.1 mL/min                       ±2%
                                                  0.100–0.999 L/min              0.001 L/min
                                                 1.00–5.00 L/min                    0.01 L/min
... More Info

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011110706

Tokimec UFP 1000 Ultrasonic Flowmeter

    Price: $319.00    POD Price: $280.00    
Tokimec UFP 1000 Ultrasonic Flowmeter

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007110502

Teledyne NALL-500GX Flowmeter

    Price: Please Call    

Teledyne Hastings-Rayfist Flowmeter, Gas: Argon, Range: 0-300 SCCM, 115 Volts AC, 0-5Volts DC can be re-calibrated to be used with other type of gas and flow range



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014110315

Tylan Mass Flow Controller Model FC-280

    Price: $299.00    POD Price: $150.00    

Tylan Mass Flow Controller Model FC-280. Flow Rate 100 sccm of CL2, Eliminates air convection currents inside its case without sacrificing response speed. Can be mounted in any position without requiring zero adjustment. Assures accuracy over the entire range of mass flow controller. Easily removed for range changes. Completely compatible with reactive and corrosive materials. Design eliminates internal dead volumes. Eliminates the need for complex, interactive multi-point linearisation during calibration.

... More Info

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004110108

Gilmont GF-1460

    Price: $399.00    POD Price: $75.00    

Gilmont Model GF-1460 flowmeter, Barnant Gilmont Flowmeters for the accurate measure of air, gas and liquid flowrates. Accuracy is +/-5% or 2mm of scale length, whichever is greater. tube 41309 Please see the flowing link for more information http://www.grayledge.com/files/Gilmont_Instruments_Catalog.pdf

... More Info

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005090509

Brooks Instrument Integrating Totalizer Model 450

    Price: Please Call    

Brooks Instrument Integrating Totalizing Model 450,



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004090509

Brooks Instrument Integrating Totalizer Model 450

    Price: Please Call    

Brooks Instrument Integrating Totalizer Model 450,



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005080902

American Meter Dry Gas Meter DTM-115

    Price: $700.00    

Diaphragm Dry Gas Laboratory Flow Meter Model DTM-115

American Meter Diaphragm Dry Gas Meter Model DTM-115 (807), highly accurate gas meter meant for laboratory test type situations,  measurement 10 liter/ rev.. Elster American Meter diaphragm meters have an outstanding record for durability and reliability.


... More Info

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004080902

American Meter Dry Gas Meter Model DTM 115

    Price: $700.00    

Laboratory Dry Gas Diaphragm Flow Meter DTM-115

American Meter Diaphragm Dry Gas Meter Model DTM-115 (807), highly accurate gas meter meant for laboratory test type situations,  measurement 10 liter/ rev.. Elster American Meter diaphragm meters have an outstanding record for durability and reliability.

... More Info

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003080902

American Meter Diaphragm Laboratory Gas Meter DTM 200A

    Price: $1,101.00    POD Price: $1,099.00    

American Meter Laboratory Dry Gas Meterr Model DTM-200A


American Meter Diaphragm Dry Gas Meter Model DTM-200A (807), highly accurate gas meter meant for laboratory test type situations,  measurement 10 liter/ rev.. Elster American Meter diaphragm meters have an outstanding record for durability and reliability.
... More Info

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002080902

DTM 200A American Meter Diaphragm Gas Meter

    Price: $800.00    POD Price: $800.00    

 Laboratory Dry Gas Meter American Meter Diaphragm DT-200A


American Meter Diaphragm Dry Gas Meter Model DTM-200A (802), highly accurate gas meter meant for laboratory test type situations,  measurement 1 liter/ rev.. Elster American Meter diaphragm meters have an outstanding record for durability and reliability.
... More Info

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031080602

Vacuum General Dyna Mass Flow Controller

    Price: $1,199.00    POD Price: $450.00    

Vacuum General Dyna Mass Flow Controller, with Km-4, FM-8, Fm-8 modules



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027071011

Cole Parmer Rotameter

    Price: $249.00    POD Price: $100.00    

Cole Parmer Flowmeter System, Variable Area Rotameter, Multitube Flowmeter, 4 tube system with 3 tubes 2MFV, o to 150 mm, Max pressure 200 psig.



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007070120

Sierra Side Trak III

    Price: $1,499.00    POD Price: $500.00    

Sierra Side Tark III Mass Flow Controller, Range 0 to 200 SLPM, Pmax 500 psi, 0.215 orifice, 0 to 5 VDC output.



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087061006

Sierra 741-1 400/hr AIR 4SS-ST-PE

    Price: Please Call    

Sierra Mass Flow controller, Large Volume Type, Model 741-1, Max flow 400 M3/Hr (Air), Operating voltage supplied. Controlling voltage: 0 to 5 VDC



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012060917

ISCO Bubbler Flow Meter

    Price: $1,999.00    POD Price: $750.00    

The ISCO Bubbler Flowmeter Model 3220 uses the bubbler method of flow level measurement. It uses 2 fuses that are 5 Amp F/B and is 12 VDC. The unit has a internal plotter chart and the flow meter is programmed with the aid of the LCD display. Large internal memory stores flow, rainfall and sampling data. The unit uses a sophisticated bubbler system with an internal air compressor to measure liquid level and convert it to flow.

... More Info

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003050306

Brooks Instruments Quantim Flow Meter

    Price: $2,499.00    POD Price: $1,000.00    

Coriolis mass flow meter/controller, Model Number QMAC003KDA1CDMCDABAFA0A

Can be used for liquids and gas. Hardware configuration. Valve: NC, seat: Kalrez, Seal: Nickel/Kalrez, fitting 1/8"VCR to 1/4"swagelok. Orifice: 0.007". Software DSP firmware 1.06, Application XB04. set-point Parameter: mass Flow.

Can be calibrated for any type of liquid etc. Supports HART communication protocol. Revision #5. Hart 4-20 ma. Max flow 3000 gm/hr

... More Info

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007050121

Sierra Instruments 901C

    Price: $349.00    POD Price: $280.00    

Mass Flow Controller, Units SCCM, N2, Range: 0 to 40



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