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Dakota Rotameters

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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.

PTFE In Line Flow Meter with 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. Supplied with a standard valve to monitor and control flow.
65mm Aluminum Flow Meter with CV 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. This rotameter comes with a CV Valve. CV Valves are designed for adjusting flow rates in applications where high resolution metering regulation is not essential.
65mm Brass Flow Meter with CV 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. This rotameter comes with a CV Valve. CV Valves are designed for adjusting flow rates in applications where high resolution metering regulation is not essential.
65mm Stainless Steel Flow Meter with CV Valve
Designed for low flow rates, these 65mm Single Tube Stainless Steel 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. This rotameter comes with a CV Valve. CV Valves are designed for adjusting flow rates in applications where high resolution metering regulation is not essential.
150mm PTFE Encased Glass Tube Flow Meter with CV Utility Valve, 1/8" FNPT Adapter
These rugged 150mm 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.
150mm PTFE Encased Glass Tube Flow Meter with MFV High Precision Valve, 1/8" FNPT Adapter
These rugged 150mm 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.
150mm PTFE Encased Glass Tube Flow Meter, 1/8" FNPT Adapter, No Valve
These rugged 150mm 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.
Encased Glass Tube In-Line Flow Meter with Valve, Brass 3/8" FNPT Adapter
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. Valve included.
Encased Glass Tube In-Line Flow Meter with Valve, 316 Stainless Steel 3/8" FNPT Adapter
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. Valve included.
Encased Glass Tube In-Line Flow Meter, PTFE, PTCFE 3/8" FNPT Adapter, 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. Valve option.
Polysulfone High Volume In-Line Flow Meter with 1 1/2" PVC Connections - Water (GPM/LPM)
The 6B0305-H2O is a high volume series of flow meters 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 connections of 1.5" FNPT, 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.
High Capacity Acrylic In-Line Flow Meter with 316 Stainless Steel Guide Rod, PVC Connector, No Valve - Water
High Capacity Acrylic In-Line Flow Meter with 316 Stainless Steel Guide Rod, PVC Connector, No Valve - Water
Helium Flow Meter - Acrylic, Stainless 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 Stainless Steel 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).
Oxygen Flow Meter - Acrylic, Stainless 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 Stainless Steel 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).
Acrylic Panel Mount Flow Meter, Polypropylene Connector, No Valve - Water
Acrylic Panel Mount Flow Meter, Polypropylene Connector, No Valve - Water
Acrylic Panel Mount Flow Meter, Polypropylene Connector, Adjustable Valve - Water
Acrylic Panel Mount Flow Meter, Polypropylene Connector, Adjustable Valve - Water
Oxygen Flow Meters - Acrylic, Brass Fittings, No Valve
This Acrylic Flow Meter has a Dual Direct Reading Scale with yellow backing for easy viewing of Oxygen flow values. Viton^® Seals, 3/8" FNPT and Brass End fittings are standard. The float/guide material is 316 Stainless Steel. This Flow Meter is designed for panel mounting and can handle a Maximum Flow Rate of 550 LPM (20 SCFM). No Valve.
65mm Aluminum Flow Meter with High Precision Valve (MFV)
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. This rotameter comes with a High Precision MFV Metering Valve. MFV Valves are ideal for adjusting flow rates whenever high sensitivity control and resolution are desirable, particularly in conjunction with metering tubes of very low flow rates.