Flow Devices

Making Things Flow Smoothly

A variable area flow meter is a device used for measuring the flow of gases or gas mixtures. When choosing a flow meter, consider the device’s material construction, pressure and temperature ratings, measuring range, and accuracy so you can choose the best meter for your gas.


150MM Flow Meters


Series 150 flow meters offer an accurate yet economical means of measuring gas or liquid flow at low pressures and over a wide range of flow rates. Suitable for both plant and laboratory use, they are widely used in gas chromatography, atomic absorption spectroscopy and process control.
Praxair 150MM Flow Meters

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High Capacity Flow Meters


Our Series 50HC flow meters offer a means of measuring gas or liquid flows at capacities up to 15scfm of air, much higher than our other variable area flow meters, and are suitable for both plant and lab use.
Praxair High Capacity Flow Meters

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Variable Area Flow Meters


Our plastic, variable area Series 50PM flow meters provide an economical means for low flow measurement and control of noncorrosive liquids and gases.

This flow meter is constructed of polycarbonate plastic. Make sure the gas you are using is compatible with this material to avoid injury to personnel and damage to equipment.

Praxair Variable Area Flow Meters

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65MM, Variable Are Flow Meters


Our Series 65 flow meters offer a cost-effective way to measure gas or liquid flow at low pressures where ± 10% accuracy is acceptable. They are suitable for plant and general lab applications. See the data sheet for approximate flow ranges for air and other gases.
Praxair 65MM Variable Area Flow Meters

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High Pressure, Metal Tube, Variable Area Flow Meters


The FM4460N Series flow meters offer economical low flow rate indication in applications where glass tube meters are not practical because of high pressure, high temperature or hazardous fluids.
High Pressure Metal Tube Variable Area Flow Meters

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Gas Blenders


The 150MM Two Tube Gas Blender is a special version of our Series 150 flow meter. It allows two gases to be metered and blended into a homogeneous, two-component mixture.
Praxair Gas Blenders

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