Rotameters

Choose a sub category:

Rotameters, also known as variable area flow meters, are ideal for measuring the flow rates of a variety of liquid and gas applications.

No electrical connections
Easy to read direct reading scales
Large selection of flow rates and configurations to accommodate the unique requirements of most application.
Low maintenance

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.
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 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
Acrylic Panel Mount Flow Meter, Polypropylene Connector, No Valve - Water
Acrylic Panel Mount Flow Meter, Polypropylene Connector, No Valve - Water
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 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.
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.
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 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.
Polysulfone High Volume In-Line Meter with 1" FNPT PVC 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 6B0600-PVC is equipped with 1" FNPT Adapters.
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.
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 Panel Mount Flow Meter with Valve, PTFE, PTCFE 3/8" FNPT Adapter, No Valve
Incorporating traditional variable area precision glass technology, these rugged PTFE panel mount 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.
Polysulfone Panel Mount Flow Meter with Polysulfone Connections - Water, 2" GPM/LPM or GPH/LPH Scales, Adjustable Needle Valve
These compact, durable flow meter units are injection molded of heat and chemical resistant Polysulfone. They feature curved Quik Loc (half union) connectors that easily couple the meter body to the pipe connectors at each end of the flow meter. Designed to be Panel Mounted.

With connections of 3/8" MNPT or 1/2" MNPT, the 6B0102 has a fluid flow range of 0.025 GPM to 10 GPM.
Encased Glass Tube Panel Mount Flow Meter, Brass 3/8" FNPT Adapter, No Valve
Incorporating traditional variable area precision glass technology, these rugged brass panel mounted 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.
Encased Glass Tube Panel Mount Flow Meter, 316 Stainless Steel 3/8" FNPT Adapter, No Valve
Incorporating traditional variable area precision glass technology, these rugged stainless steel panel mounted 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.
65mm Stainless Steel Flow Meter with High Precision Valve (MFV)
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 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.