Dakota Rotameters

Rotameters, also known as variable area flow meters, are ideal for measuring the flow rates of a variety of liquid and gas applications. These popular, practical units consist of a tube, float, linear scale, long measurement range, and low pressure drop. Models are economical, reliable, simple to maintain, and easy to install. They can withstand corrosive fluids as well as high temperatures and pressures. Rotameters can be calibrated for most gases or liquids. Acrylic, polysulfone, and encased glass-tubed models are available.

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  1. Nitrogen Flow Meter - Acrylic, Polypropylene Fittings, Valve Included

    Nitrogen Flow Meter - Acrylic, Polypropylene Fittings, Valve Included

    This Acrylic Flowmeter has a Dual Direct Reading Scale with yellow backing for easy viewing of Nitrogen flow values. Viton® Seals, 3/4" FNPT and Polypropylene End fittings are standard. The float/guide material is 316 Stainless Steel. This Flowmeter is designed for inline mounting and can handle a Maximum Flow Rate of 3000 LPM (100 SCFM). Valve Included.
  2. Helium Flow Meter - Acrylic, Brass Fittings

    Helium Flow Meter - Acrylic, Brass Fittings

    Available for multiple flow rates, this Acrylic Flow Meter has a Dual Direct Reading Scale with yellow backing for easy viewing of Helium flow values. Viton Seals, 1/8" FNPT and Brass End fittings are standard. The float material varies based on the metering range (316 SS, Carboloy, Glass). Available for metering flow rates from 2.0 LPM (4.0 SCFH) to 110 LPM (250 SCFH).
  3. Oxygen Flow Meter - Acrylic, Brass Fittings

    Oxygen Flow Meter - Acrylic, Brass Fittings

    Available for multiple flow rates, this Acrylic Flow Meter has a Dual Direct Reading Scale with yellow backing for easy viewing of Oxygen flow values. Viton Seals, 1/8" FNPT and Brass End fittings are standard. The float material varies based on the metering range (316 SS, Carboloy, Glass). Available for metering flow rates from 1.1 LPM (2.5 SCFH) to 45 LPM (90 SCFH).
  4. In-Line No Valve Model

    In Line PTFE Flow Meter, No Valve, PFA Flow Tube & PTFE/PCTFE Wetted Parts

    Made entirely of PTFE, PFA and PCTFE, the In-Line PTFE Flow Meter is excellent for high-purity applications or use with corrosive liquids. These meters feature chemically inert wetted components and a removable protective shield. Each meter is individually leak tested.
  5. 65mm Aluminum Flow Meter, No Valve

    65mm Aluminum Flow Meter, No Valve

    Designed for low flow rates, these 65mm Single Tube Aluminum Flow Meters are precision instruments embodying the inherent simplicity, versatility and economy of the classical variable area meter. They are particularly suitable for metering carrier gases in chromatography, in manufacturing processes, liquid and gas measurements in laboratories, pilot plants, flow and level indicating and controlling gases. No Valve.
  6. 65mm Brass Flow Meter, No Valve

    65mm Brass Flow Meter, No Valve

    Designed for low flow rates, these 65mm Single Tube Brass Flow Meters are precision instruments embodying the inherent simplicity, versatility and economy of the classical variable area meter. They are particularly suitable for metering carrier gases in chromatography, in manufacturing processes, liquid and gas measurements in laboratories, pilot plants, flow and level indicating and controlling gases. No Valve.
  7. 65mm Stainless Steel Flow Meter, No Valve

    65mm Stainless Steel Flow Meter, No Valve

    Designed for low flow rates, these 65mm Single Tube Brass Flow Meters are precision instruments embodying the inherent simplicity, versatility and economy of the classical variable area meter. They are particularly suitable for metering carrier gases in chromatography, in manufacturing processes, liquid and gas measurements in laboratories, pilot plants, flow and level indicating and controlling gases. No Valve.
  8. 65mm PTFE Encased Glass Tube Flow Meter with CV Utility Valve, 1/8" FNPT Adapter

    65mm PTFE Encased Glass Tube Flow Meter with CV Utility Valve, 1/8" FNPT Adapter

    These rugged 65mm PTFE-Glass Flow Meters offer solutions to low to medium flow range measurements of highly corrosive or ultra-pure liquids and gases. Wetted inert components are surrounded by structurally rigid anodized aluminum. The resultant design represents a unique combination of a rugged mechanically rigid frame and chemically inert wetted parts. This rotameter comes with a CV® Utility Valve Cartridge. CV® Valve Cartridges are designed for adjusting flow rates in applications where high resolution metering regulation is not essential.
  9. 65mm PTFE Encased Glass Tube Flow Meter with MFV High Precision Valve, 1/8" FNPT Adapter

    65mm PTFE Encased Glass Tube Flow Meter with MFV High Precision Valve, 1/8" FNPT Adapter

    These rugged 65mm PTFE-Glass Flow Meters offer solutions to low to medium flow range measurements of highly corrosive or ultra-pure liquids and gases. Wetted inert components are surrounded by structurally rigid anodized aluminum. The resultant design represents a unique combination of a rugged mechanically rigid frame and chemically inert wetted parts. This rotameter comes with an MFV® High Precision Valve for high sensitivity control and resolution.
  10. 65mm PTFE Encased Glass Tube Flow Meter, 1/8" FNPT Adapter, No Valve

    65mm PTFE Encased Glass Tube Flow Meter, 1/8" FNPT Adapter, No Valve

    These rugged 65mm PTFE-Glass Flow Meters offer solutions to low to medium flow range measurements of highly corrosive or ultra-pure liquids and gases. Wetted inert components are surrounded by structurally rigid anodized aluminum. The resultant design represents a unique combination of a rugged mechanically rigid frame and chemically inert wetted parts. No Valve.
  11. Encased Glass Tube In-Line Flow Meter, Brass 3/8" FNPT Adapter, No Valve

    Encased Glass Tube In-Line Flow Meter, Brass 3/8" FNPT Adapter, No Valve

    Incorporating traditional variable area precision glass technology, these rugged brass in-line flow meters offer accurate and economical solutions to medium flow range measurements. These meters are designed with unique rotatable scales of dual air-water direct reading graduations showing SCFM and SLPM (air), as well as GPM and LPM (water) markings. No Valve.
  12. Encased Glass Tube In-Line Flow Meter, 316 Stainless Steel 3/8" FNPT Adapter, No Valve

    Encased Glass Tube In-Line Flow Meter, 316 Stainless Steel 3/8" FNPT Adapter, No Valve

    Incorporating traditional variable area precision glass technology, these rugged stainless steel in-line flow meters offer accurate and economical solutions to medium flow range measurements. These meters are designed with unique rotatable scales of dual air-water direct reading graduations showing SCFM and SLPM (air), as well as GPM and LPM (water) markings. No Valve.
  13. Encased Glass Tube In-Line Flow Meter, PTFE, PTCFE 3/8" FNPT Adapter, No Valve

    Encased Glass Tube In-Line Flow Meter, PTFE, PTCFE 3/8" FNPT Adapter, No Valve

    Incorporating traditional variable area precision glass technology, these rugged PTFE in-line flow meters offer accurate and economical solutions to medium flow range measurements. These meters are designed with unique rotatable scales of dual air-water direct reading graduations showing SCFM and SLPM (air), as well as GPM and LPM (water) markings. No Valve.
  14. Polysulfone High Volume In-Line Flow Meter - Water (GPM/LPM), No Valve

    Polysulfone High Volume In-Line Flow Meter - Water (GPM/LPM), No Valve

    The 6B0300-H2O is a high volume flow meter offering excellent accuracy and repeatability. Combined with a durable injection molded Polysulfone meter body and connections, this flow meter offers cost effective 316 SS internal parts. This flow meter is designed for inline mounting. With a 1" FNPT connection, this line has a liquid flow range of 0.5 to 40 GPM (2 - 155 LPM). Half unions couple the meter body to the connectors at each end of the flow meter, facilitating both installation and maintenance.
  15. Polysulfone High Volume In-Line Flow Meter with FNPT PVDF Connections - Water (GPM/LPM)

    Polysulfone High Volume In-Line Flow Meter with FNPT PVDF Connections - Water (GPM/LPM)

    The 6B06 series flow meter's rib guided polysulfone contains no metal in the fluid path. This makes the flow meter desirable in highly corrosive environments or deionized water applications. The 6B0601-PVDF is equipped with 1" FNPT Adapters.
  16. Acrylic In-Line Flow Meter, Polypropylene Connector, No Valve - Water

    Acrylic In-Line Flow Meter, Polypropylene Connector, No Valve - Water

    Acrylic In-Line Flow Meter, Polypropylene Connector, No Valve - Water
  17. Acrylic In-Line Flow Meter with 316 Stainless Steel Guide Rods, Polypropylene Connector, No Valve - Water

    Acrylic In-Line Flow Meter with 316 Stainless Steel Guide Rods, Polypropylene Connector, No Valve - Water

    Acrylic In-Line Flow Meter with 316 Stainless Steel Guide Rods, Polypropylene Connector, No Valve - Water
  18. High Volume Acrylic In-Line Flow Meter with 316 Stainless Steel Guide Rods, PVC Connector, No Valve - Water

    High Volume Acrylic In-Line Flow Meter with 316 Stainless Steel Guide Rods, PVC Connector, No Valve - Water

    High Volume Acrylic In-Line Flow Meter with 316 Stainless Steel Guide Rods, PVC Connector, No Valve - Water

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