Flow Control
Explore our comprehensive range of Flow Control products, featuring precision instruments such as flow meters, flow switches, flow transmitters, and flow sensors. Our offerings cater to diverse applications, ensuri...
Categories in Flow Control Products (6)
Flow Meters
Flow meters are a piece of essential equipment for many industries, as they allow for accurately measuring fluid flow rates. At Centro, we carry a complete online selection of flow meters, including magnetic flow meters, turbine flow meters, and positive displacement flow meters. We also offer a variety of accessories and replacement parts to ensure that your flow meter always operates at peak efficiency. Whether you're looking for a new flow meter or need to restock your supplies, Centro has everything you need to keep your operation running smoothly.
Flow Switches
Flow switches are vital instruments in fluid systems that detect the presence or absence of flow. These devices ensure proper operation and prevent issues such as pump damage or system failure. Flow switches are employed in various industries to monitor and control the flow of liquids or gases, providing a reliable means of safeguarding equipment and optimizing fluid processes.
Flow Transmitters
Flow Transmitters are essential in fluid systems, accurately measuring and transmitting flow rate data. These devices play a critical role in monitoring and controlling the flow of liquids or gases in various applications. By providing real-time information, Flow Transmitters enable precise adjustments, ensuring optimal performance and efficiency. Their reliability and accuracy make them indispensable for industries where precise flow measurement is crucial.
Flow Sensors
Flow Sensors are key elements in fluid systems, detecting and measuring the flow rate. These devices offer real-time data on liquid or gas movement, enabling precise control and monitoring. Flow Sensors are essential in manufacturing, healthcare, and environmental monitoring industries, providing valuable insights for process optimization, quality control, and regulatory compliance.
Flow, pH & Conductivity Meters, Transmitters & Controllers
Centro offers a wide range of flow, pH, and conductivity meters, transmitters, and controllers to meet the demands of various industrial and commercial applications. From monitoring flow rates and maintaining chemical balance for fluid quality and consistency, our solutions are engineered for precision, reliability, and seamless integration. We provide products such as magnetic and ultrasonic flow meters, pH controllers, and conductivity transmitters designed to optimize performance in industries like water treatment, food and beverage, chemical processing, and pharmaceuticals.
Whether you need accurate measurements, durable equipment, or easy system integration, Centro has the expertise and products to support your operations. Explore our selection online or contact our team to find the right solution for your application and ensure peak system efficiency.
Flow Control Accessories
Flow Control Accessories encompass a range of supplementary components designed to optimize, support, or enhance the operation of primary flow control equipment such as valves, regulators, actuators, and pumps. These accessories are critical in ensuring precise control, safety, and efficiency within fluid and gas systems across industrial, commercial, and residential applications.
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The Dwyer - FT-MC22-02 is a Quick Coupling Insert featuring Plug, Barbed, Straight, Chrome-Plated Brass, 1/8 " (ID), and Straight Thru. Part of the FT-MC Series. Sold individually.
$26.44
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FT-PLCD100-04 is a Plastic Quick Coupling featuring Socket, Threaded, 1/4 " NPT Male, Straight, Acetal, and Shutoff. Part of the FT-PLC Series. Sold individually.
$31.63
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FT-PMC22-02-12 is a Quick Coupling Insert featuring Plug, Barbed, Straight, Polypropylene, 1/8 " (ID), and Straight Thru. Part of the FT-PMC-12 Series. Sold individually.
$15.57
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FTB-810-I is a Turbine Flow Meter featuring Liquid, 0.66 GPM to 6.6 GPM (2.498 LPM to 24.98 LPM), 1/2 ", NPT Male, ± 0.5 %, 4 mA to 20 mA, 304, 316, CD4MCU SS, and Tungsten Carbide. Part of the FTB-800 Series. Sold individually.
$1,356.46
Should ship between 01 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FV104 is a Vortex Shedding Flow Meter featuring 5 GPM to 50 GPM, 1 " NPT Female, ± 2 %, 10 Vdc to 30 Vdc, 4 mA to 20 mA, 125 mA SPST SSR, Brass, PVDF, FKM O-RING, and LCD Display. Part of the FV101 Series. Sold individually.
$1,361.89
Should ship between 12 Jan and 19 Jan
Subject to factory lead times
Configure product to see pricing
The KOBOLD KAL-L thermal air flow switch delivers intelligent flow monitoring for non-hazardous gases with rapid response times and sophisticated temperature compensation achieved through a dual RTD design—one sensor detecting flow while the other monitors ambient conditions to prevent false alarms from environmental temperature shifts. This insertion-style unit, featuring a bright 8-digit LED bargraph flow indicator and adjustable response time (1-60 seconds), enables precise monitoring across a vast range of pipe diameters without requiring specific calibration for each application size—simply knowing your system's flow velocity is sufficient for proper implementation. The compact polyamide housing with nickel-plated brass sensor provides reliable performance in temperatures from -10°F to 250°F with pressures up to 120 PSIG, while offering adjustable setpoints through an accessible potentiometer and visual status indication via a two-color LED. With no moving parts to wear out or cause pressure drop, this solid-state monitoring solution maintains ±10% switching accuracy and exceptional ±1% repeatability across flow velocities from 3.3 to 66 ft/sec (capable of monitoring from 344 SCFM in 4" ducts to over 34,000 SCFM in 40" systems). Available with convenient mounting options including 1/2" NPT threads or 2-bolt flange connections, and electrical interface choices of conduit hub or quick disconnect with cable, the KAL-L delivers maintenance-free operation with IP65 environmental protection that makes it ideal for HVAC systems, ventilation monitoring, and other critical air flow applications.
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The Dwyer - BV2000TRN350A is a Vision Turbine Flow Meter featuring NSF/ANSI Certified, Liquid, 2 LPM to 35 LPM, 3/8 ", NPT Male, ± 3 %, Amplified Square Wave, Trogamid, PTFE, Graphite, and 3-Pin Mini DIN. Part of the BV2000 Series. Sold individually.
$125.22
Should ship between 09 Feb and 16 Feb
Subject to factory lead times
The Dwyer - FL-2012-NV is a Variable Area Flow Meter featuring Air, 0.2 LPM to 2.5 LPM, 100 psi, 1/8 " NPT Female, ± 5 %, Direct Read, Acrylic, Buna, and Brass. It is rated for a temperature range of 65 °C (150 °F). Part of the FL-2000 Series. Sold individually.
$133.86
Should ship between 15 Dec and 22 Dec
Subject to factory lead times
The Dwyer - FL-2063-NV is a Variable Area Flow Meter featuring Air, 14 LPM to 140 LPM, 100 psi, 1/4 " NPT Female, ± 3 %, Direct Read, Acrylic, Buna, and Brass. It is rated for a temperature range of 65 °C (150 °F). Part of the FL-2000 Series. Sold individually.
$204.40
Should ship between 15 Dec and 22 Dec
Subject to factory lead times
The Dwyer - FLMG-14012AL is a Variable Area Flow Meter featuring Pneumatic, In-line, Air, 3 SCFM to 12 SCFM, 600 psi, 1/4 " NPT Female, ± 4 %, Direct Read, Al, Buna, PTFE, and SS. It is rated for a temperature range of 116 °C (240 °F). Part of the FLMG Series. Sold individually.
$408.74
Should ship between 24 Nov and 01 Dec
Subject to factory lead times
The Dwyer - FLR1012 is a Turbine Flow Meter featuring Low-Flow, Liquid, 0.5 LPM to 5 LPM, 3/8 ", Compression Fitting, ± 3 %, 0 Vdc to 5 Vdc, PPS, Glass, SS, Sapphire, and FKM. Part of the FLR1000 Series. Sold individually.
$554.56
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FMA-A2303 is a Mass Flow Meter featuring Gas, 1 SCCM to 100 SCCM, 250 psi, 1/4 " NPT Female, 0 Vdc to 5 Vdc, 4 mA to 20 mA, LCD, ± 1 %, 17-4 SS, Acetal, and FKM. It is rated for a temperature range of 50 °C (122 °F). Part of the FMA-A2000 Series. Sold individually.
$1,075.29
Should ship between 24 Nov and 01 Dec
Subject to factory lead times
The Dwyer - FMA5508A is a Mass Flow Controller featuring Economical, Gas, 2.5 SCCM to 100 SCCM, 1000 psi, ± 1 %, 1/4 " Compression, 0 Vdc to 5 Vdc, 4 mA to 20 mA, Std, LCD, Al, Brass, and FKM. It is rated for a temperature range of 50 °C (122 °F). Part of the FMA5500A Series. Sold individually.
$1,472.42
Should ship between 01 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FMA5516A is a Mass Flow Controller featuring Economical, Gas, 0.05 SLM to 2 SLM, 1000 psi, ± 1 %, 1/4 " Compression Fitting, 0 Vdc to 5 Vdc, 4 mA to 20 mA, Std, LCD, Al, Brass, and FKM. It is rated for a temperature range of 50 °C (122 °F). Part of the FMA5500A Series. Sold individually.
$1,472.42
Should ship between 01 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FP-2541 is a Flow Sensor with 1.5 " NPT Thread featuring High Performance, 5 Vdc to 24 Vdc, 0.3 FPS to 20 FPS, ± 1 % Accuracy, Amplified Square Pulse, 316 SS, and 250 psi. Sold individually.
$1,096.34
Should ship between 15 Dec and 22 Dec
Subject to factory lead times
The Dwyer - FT-MCD16-02 is a Quick Coupling Body featuring Socket, Barbed, Straight Panel Mount, Chrome-Plated Brass, 1/8 " (ID), and Shutoff. Part of the FT-MC Series. Sold individually.
$69.72
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FT-PLCD170-04 is an In-line Quick Coupling featuring Streamline, Socket, Barbed, Straight, Acetal, 1/4 " (ID), and Shutoff. Part of the FT-PLC Series. Sold individually.
$25.55
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FTB-1412 is a Turbine Flow Meter featuring Economical, Liquid, 0.75 GPM to 7.5 GPM, 1/2 ", NPT Male, ± 1 %, Sinusoidal Wave, 316 SS, and Tungsten Carbide. Part of the FTB-1400 Series. Sold individually.
$1,111.15
Should ship between 17 Nov and 24 Nov
Subject to factory lead times
The Dwyer - FTB4805 is a Turbine Flow Meter featuring Low-Flow, Liquid, 0.1 GPM to 10 GPM, 1/2 ", NPT Female, ± 1 %, Amplified Square Wave, 316 SS, PVDF, Tungsten Carbide, Ruby, and FKM. Part of the FTB4700 Series. Sold individually.
$2,273.09
Should ship between 24 Nov and 01 Dec
Subject to factory lead times
Configure product to see pricing
The precision-engineered KOBOLD DPL All-Plastic Paddle Wheel Flow Sensor delivers reliable measurement of transparent liquids with flow rates up to 400 GPH, making it ideal for applications where chemical compatibility and cost-effectiveness are essential. Featuring a compact design that integrates seamlessly into space-constrained installations like the interior of larger systems, this versatile transmitter uses non-contact optoelectronic sensing to convert rotary paddle wheel motion into proportional frequency signals. KOBOLD USA With all wetted components constructed from synthetic materials including polypropylene housing, polysulfone vane mount, and sapphire axle/bearing, the DPL provides exceptional resistance to aggressive chemicals while maintaining measurement accuracy in harsh environments. Available with multiple output options including frequency signal or analog output, this flow sensor offers flexible integration capabilities for monitoring and control applications across industrial, commercial, and laboratory settings. Operating at pressures up to 145 PSI and temperatures to 160°F, the DPL combines American manufacturing quality with innovative design elements like sapphire-supported vanes that ensure high linearity and extended service life in critical fluid handling systems.
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The Dwyer - FL-3210ST-HRV is a Variable Area Flow Meter w/60 mm Flow Tube featuring 52.2 SCCM to 522 SCCM Air, 1.2 SCCM to 12 SCCM Water, 200 psi, 1/8 " NPT Female, ± 2 %, 0 to 65, w/Valve, and 16 Turn. It is rated for a temperature range of 121 °C (250 °F). Part of the FL-3200 Series. Sold individually.
$302.35
Should ship between 24 Nov and 01 Dec
Subject to factory lead times
The Dwyer - FLK-2221 is a Variable Area Flow Meter featuring Water, 0.25 GPH to 25 GPH, 125 psi, 1/8 " NPT Female, ± 4 %, Direct Read, Acrylic, Brass, SS, Silicone Rubber, and w/Valve. It is rated for a temperature range of 60 °C (140 °F). Part of the FLK-2000 Series. Sold individually.
$97.87
Should ship between 24 Nov and 01 Dec
Subject to factory lead times
The Dwyer - FMA-2617A is a Mass & Volumetric Flow Controller featuring RS232, Gas, 0.5 SCCM to 100 SCCM, 145 psi, ± 0.8 %, 1/8 " NPT F, 0 Vdc to 5 Vdc, w/Power Supply, LCD, 300 SS, Al, Silicone, and FKM. It is rated for a temperature range of 50 °C. Part of the FMA-2600A Series. Sold individually.
$2,689.70
Should ship between 17 Nov and 24 Nov
Subject to factory lead times
The Dwyer - FMA-2620A is a Mass & Volumetric Flow Controller featuring RS232, Gas, 0.005 SLM to 1 SLM, 145 psi, ± 0.8 %, 1/8 " NPT Female, 0 Vdc to 5 Vdc, w/Power Supply, LCD, 300 SS, Al, Silicone, and FKM. It is rated for a temperature range of 50 °C. Part of the FMA-2600A Series. Sold individually.
$2,689.70
Should ship between 17 Nov and 24 Nov
Subject to factory lead times
The Dwyer - FT-MC22-02 is a Quick Coupling Insert featuring Plug, Barbed, Straight, Chrome-Plated Brass, 1/8 " (ID), and Straight Thru. Part of the FT-MC Series. Sold individually.
$26.44
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FT-PLCD100-04 is a Plastic Quick Coupling featuring Socket, Threaded, 1/4 " NPT Male, Straight, Acetal, and Shutoff. Part of the FT-PLC Series. Sold individually.
$31.63
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FT-PMC22-02-12 is a Quick Coupling Insert featuring Plug, Barbed, Straight, Polypropylene, 1/8 " (ID), and Straight Thru. Part of the FT-PMC-12 Series. Sold individually.
$15.57
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FTB-810-I is a Turbine Flow Meter featuring Liquid, 0.66 GPM to 6.6 GPM (2.498 LPM to 24.98 LPM), 1/2 ", NPT Male, ± 0.5 %, 4 mA to 20 mA, 304, 316, CD4MCU SS, and Tungsten Carbide. Part of the FTB-800 Series. Sold individually.
$1,356.46
Should ship between 01 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FV104 is a Vortex Shedding Flow Meter featuring 5 GPM to 50 GPM, 1 " NPT Female, ± 2 %, 10 Vdc to 30 Vdc, 4 mA to 20 mA, 125 mA SPST SSR, Brass, PVDF, FKM O-RING, and LCD Display. Part of the FV101 Series. Sold individually.
$1,361.89
Should ship between 12 Jan and 19 Jan
Subject to factory lead times
Configure product to see pricing
The KOBOLD KAL-L thermal air flow switch delivers intelligent flow monitoring for non-hazardous gases with rapid response times and sophisticated temperature compensation achieved through a dual RTD design—one sensor detecting flow while the other monitors ambient conditions to prevent false alarms from environmental temperature shifts. This insertion-style unit, featuring a bright 8-digit LED bargraph flow indicator and adjustable response time (1-60 seconds), enables precise monitoring across a vast range of pipe diameters without requiring specific calibration for each application size—simply knowing your system's flow velocity is sufficient for proper implementation. The compact polyamide housing with nickel-plated brass sensor provides reliable performance in temperatures from -10°F to 250°F with pressures up to 120 PSIG, while offering adjustable setpoints through an accessible potentiometer and visual status indication via a two-color LED. With no moving parts to wear out or cause pressure drop, this solid-state monitoring solution maintains ±10% switching accuracy and exceptional ±1% repeatability across flow velocities from 3.3 to 66 ft/sec (capable of monitoring from 344 SCFM in 4" ducts to over 34,000 SCFM in 40" systems). Available with convenient mounting options including 1/2" NPT threads or 2-bolt flange connections, and electrical interface choices of conduit hub or quick disconnect with cable, the KAL-L delivers maintenance-free operation with IP65 environmental protection that makes it ideal for HVAC systems, ventilation monitoring, and other critical air flow applications.
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The Dwyer - BV2000TRN350A is a Vision Turbine Flow Meter featuring NSF/ANSI Certified, Liquid, 2 LPM to 35 LPM, 3/8 ", NPT Male, ± 3 %, Amplified Square Wave, Trogamid, PTFE, Graphite, and 3-Pin Mini DIN. Part of the BV2000 Series. Sold individually.
$125.22
Should ship between 09 Feb and 16 Feb
Subject to factory lead times
The Dwyer - FL-2012-NV is a Variable Area Flow Meter featuring Air, 0.2 LPM to 2.5 LPM, 100 psi, 1/8 " NPT Female, ± 5 %, Direct Read, Acrylic, Buna, and Brass. It is rated for a temperature range of 65 °C (150 °F). Part of the FL-2000 Series. Sold individually.
$133.86
Should ship between 15 Dec and 22 Dec
Subject to factory lead times
The Dwyer - FL-2063-NV is a Variable Area Flow Meter featuring Air, 14 LPM to 140 LPM, 100 psi, 1/4 " NPT Female, ± 3 %, Direct Read, Acrylic, Buna, and Brass. It is rated for a temperature range of 65 °C (150 °F). Part of the FL-2000 Series. Sold individually.
$204.40
Should ship between 15 Dec and 22 Dec
Subject to factory lead times
The Dwyer - FLMG-14012AL is a Variable Area Flow Meter featuring Pneumatic, In-line, Air, 3 SCFM to 12 SCFM, 600 psi, 1/4 " NPT Female, ± 4 %, Direct Read, Al, Buna, PTFE, and SS. It is rated for a temperature range of 116 °C (240 °F). Part of the FLMG Series. Sold individually.
$408.74
Should ship between 24 Nov and 01 Dec
Subject to factory lead times
The Dwyer - FLR1012 is a Turbine Flow Meter featuring Low-Flow, Liquid, 0.5 LPM to 5 LPM, 3/8 ", Compression Fitting, ± 3 %, 0 Vdc to 5 Vdc, PPS, Glass, SS, Sapphire, and FKM. Part of the FLR1000 Series. Sold individually.
$554.56
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FMA-A2303 is a Mass Flow Meter featuring Gas, 1 SCCM to 100 SCCM, 250 psi, 1/4 " NPT Female, 0 Vdc to 5 Vdc, 4 mA to 20 mA, LCD, ± 1 %, 17-4 SS, Acetal, and FKM. It is rated for a temperature range of 50 °C (122 °F). Part of the FMA-A2000 Series. Sold individually.
$1,075.29
Should ship between 24 Nov and 01 Dec
Subject to factory lead times
The Dwyer - FMA5508A is a Mass Flow Controller featuring Economical, Gas, 2.5 SCCM to 100 SCCM, 1000 psi, ± 1 %, 1/4 " Compression, 0 Vdc to 5 Vdc, 4 mA to 20 mA, Std, LCD, Al, Brass, and FKM. It is rated for a temperature range of 50 °C (122 °F). Part of the FMA5500A Series. Sold individually.
$1,472.42
Should ship between 01 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FMA5516A is a Mass Flow Controller featuring Economical, Gas, 0.05 SLM to 2 SLM, 1000 psi, ± 1 %, 1/4 " Compression Fitting, 0 Vdc to 5 Vdc, 4 mA to 20 mA, Std, LCD, Al, Brass, and FKM. It is rated for a temperature range of 50 °C (122 °F). Part of the FMA5500A Series. Sold individually.
$1,472.42
Should ship between 01 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FP-2541 is a Flow Sensor with 1.5 " NPT Thread featuring High Performance, 5 Vdc to 24 Vdc, 0.3 FPS to 20 FPS, ± 1 % Accuracy, Amplified Square Pulse, 316 SS, and 250 psi. Sold individually.
$1,096.34
Should ship between 15 Dec and 22 Dec
Subject to factory lead times
The Dwyer - FT-MCD16-02 is a Quick Coupling Body featuring Socket, Barbed, Straight Panel Mount, Chrome-Plated Brass, 1/8 " (ID), and Shutoff. Part of the FT-MC Series. Sold individually.
$69.72
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FT-PLCD170-04 is an In-line Quick Coupling featuring Streamline, Socket, Barbed, Straight, Acetal, 1/4 " (ID), and Shutoff. Part of the FT-PLC Series. Sold individually.
$25.55
Should ship between 08 Dec and 15 Dec
Subject to factory lead times
The Dwyer - FTB-1412 is a Turbine Flow Meter featuring Economical, Liquid, 0.75 GPM to 7.5 GPM, 1/2 ", NPT Male, ± 1 %, Sinusoidal Wave, 316 SS, and Tungsten Carbide. Part of the FTB-1400 Series. Sold individually.
$1,111.15
Should ship between 17 Nov and 24 Nov
Subject to factory lead times
The Dwyer - FTB4805 is a Turbine Flow Meter featuring Low-Flow, Liquid, 0.1 GPM to 10 GPM, 1/2 ", NPT Female, ± 1 %, Amplified Square Wave, 316 SS, PVDF, Tungsten Carbide, Ruby, and FKM. Part of the FTB4700 Series. Sold individually.
$2,273.09
Should ship between 24 Nov and 01 Dec
Subject to factory lead times
Configure product to see pricing
The precision-engineered KOBOLD DPL All-Plastic Paddle Wheel Flow Sensor delivers reliable measurement of transparent liquids with flow rates up to 400 GPH, making it ideal for applications where chemical compatibility and cost-effectiveness are essential. Featuring a compact design that integrates seamlessly into space-constrained installations like the interior of larger systems, this versatile transmitter uses non-contact optoelectronic sensing to convert rotary paddle wheel motion into proportional frequency signals. KOBOLD USA With all wetted components constructed from synthetic materials including polypropylene housing, polysulfone vane mount, and sapphire axle/bearing, the DPL provides exceptional resistance to aggressive chemicals while maintaining measurement accuracy in harsh environments. Available with multiple output options including frequency signal or analog output, this flow sensor offers flexible integration capabilities for monitoring and control applications across industrial, commercial, and laboratory settings. Operating at pressures up to 145 PSI and temperatures to 160°F, the DPL combines American manufacturing quality with innovative design elements like sapphire-supported vanes that ensure high linearity and extended service life in critical fluid handling systems.
Configure Product
Configure product to see pricing
The Dwyer - FL-3210ST-HRV is a Variable Area Flow Meter w/60 mm Flow Tube featuring 52.2 SCCM to 522 SCCM Air, 1.2 SCCM to 12 SCCM Water, 200 psi, 1/8 " NPT Female, ± 2 %, 0 to 65, w/Valve, and 16 Turn. It is rated for a temperature range of 121 °C (250 °F). Part of the FL-3200 Series. Sold individually.
$302.35
Should ship between 24 Nov and 01 Dec
Subject to factory lead times
The Dwyer - FLK-2221 is a Variable Area Flow Meter featuring Water, 0.25 GPH to 25 GPH, 125 psi, 1/8 " NPT Female, ± 4 %, Direct Read, Acrylic, Brass, SS, Silicone Rubber, and w/Valve. It is rated for a temperature range of 60 °C (140 °F). Part of the FLK-2000 Series. Sold individually.
$97.87
Should ship between 24 Nov and 01 Dec
Subject to factory lead times
The Dwyer - FMA-2617A is a Mass & Volumetric Flow Controller featuring RS232, Gas, 0.5 SCCM to 100 SCCM, 145 psi, ± 0.8 %, 1/8 " NPT F, 0 Vdc to 5 Vdc, w/Power Supply, LCD, 300 SS, Al, Silicone, and FKM. It is rated for a temperature range of 50 °C. Part of the FMA-2600A Series. Sold individually.
$2,689.70
Should ship between 17 Nov and 24 Nov
Subject to factory lead times
The Dwyer - FMA-2620A is a Mass & Volumetric Flow Controller featuring RS232, Gas, 0.005 SLM to 1 SLM, 145 psi, ± 0.8 %, 1/8 " NPT Female, 0 Vdc to 5 Vdc, w/Power Supply, LCD, 300 SS, Al, Silicone, and FKM. It is rated for a temperature range of 50 °C. Part of the FMA-2600A Series. Sold individually.
$2,689.70
Should ship between 17 Nov and 24 Nov
Subject to factory lead times
FAQS
- Measuring flow rate in a pipe requires a flow meter matched to the fluid type, pipe size, flow range, and accuracy requirement. For conductive liquids (water, chemicals, slurries), magnetic flow meters are the most popular choice — they have no moving parts, create no pressure drop, and handle dirty or abrasive fluids. For non-conductive liquids or retrofit installations where you can't cut the pipe, clamp-on ultrasonic flow meters mount externally and measure through the pipe wall. For applications requiring the highest accuracy or mass flow measurement (batching, custody transfer), Coriolis meters measure mass flow directly. For steam and gas, vortex meters are robust and widely used. For simple, low-cost local visual indication of flow rate, variable-area meters (rotameters) provide a direct reading without power or electronics. Flow switches are used when you only need to confirm flow is present or absent — for example, verifying cooling water is running before allowing a machine to start. The flow meter output (typically 4–20 mA) feeds back to a PLC or controller for monitoring, totalization, or closed-loop flow control.
- The flow meter technology must match the fluid type, pipe size, accuracy requirement, and process conditions. Magnetic (mag) flow meters measure conductive liquids (water, chemicals, slurries) using Faraday's law — they have no moving parts, handle dirty or abrasive fluids well, and are the default for water and wastewater applications. Ultrasonic flow meters (transit-time and Doppler) are non-intrusive and can be clamp-on, ideal for retrofit or applications where the pipe cannot be cut. Coriolis meters measure mass flow directly with very high accuracy — the premium choice for custody transfer, batching, and applications requiring density measurement. Vortex meters are robust and versatile for steam, gas, and liquid measurement in moderate-to-large pipe sizes. Variable-area meters (rotameters) provide simple, low-cost local visual indication of flow rate. Turbine meters offer high accuracy for clean, low-viscosity liquids. The best approach is to define the fluid properties, flow range, accuracy requirement, and installation constraints, then match to the technology that fits.
- A flow switch detects whether flow is present or absent (or above/below a threshold) and outputs a discrete on/off signal — it does not measure the actual flow rate. Flow switches are used for protection and alarm functions: confirming cooling water is flowing before allowing a machine to operate, detecting loss of lubrication flow to trigger a shutdown, or verifying that a pump is actually moving fluid. They are simpler and less expensive than flow meters. A flow meter, by contrast, measures the actual flow rate (GPM, liters/minute, SCFM, etc.) and provides a continuous analog or digital output proportional to the flow value. Flow meters are used when the control system needs to know how much fluid is flowing — for batching, dosing, energy accounting, and closed-loop flow control. If you only need to know whether flow is on or off, a flow switch is sufficient. If you need to know how much, you need a flow meter.
- A magnetic flow meter (mag meter) uses Faraday's law of electromagnetic induction to measure the velocity of a conductive liquid flowing through a pipe. The meter generates a magnetic field across the pipe, and the flowing conductive liquid produces a voltage proportional to its velocity — this voltage is measured by electrodes in the pipe wall and converted to a flow rate. Mag meters have several significant advantages: no moving parts (zero maintenance on the sensor itself), no obstruction to flow (full bore, no pressure drop), excellent performance with dirty, abrasive, and slurry-containing liquids, wide turndown ratios (typically 100:1 or greater), and bidirectional measurement capability. They are the standard choice for water and wastewater treatment, chemical processing, food and beverage, pharmaceutical, and pulp and paper applications. The main limitation is that the liquid must be electrically conductive (minimum ~5 µS/cm) — mag meters cannot measure hydrocarbons, deionized water, or gases.
- Flow meter sizing must balance accuracy, rangeability, and pressure drop. The meter should be sized so that the normal operating flow rate falls within the meter's optimal accuracy range — typically between 25% and 75% of its full-scale capacity. Sizing based solely on the pipe diameter is a common mistake — if the pipe is oversized for the actual flow rate (which is common in many installations), the flow velocity through the meter will be too low for accurate measurement. In these cases, the meter should be sized smaller than the pipe, with reducers and expanders installed to transition from the pipe size to the meter size. Key data needed for sizing includes the fluid type and properties (density, viscosity, conductivity, temperature, pressure), the minimum, normal, and maximum flow rates, the required accuracy, and the acceptable pressure drop. Most flow meter manufacturers provide online sizing tools where you input these parameters and receive a recommended meter size and model.