Variable Area Flow Meters (Rotameters)

Process-proven flow meters. For maximum repeatability and reliability.

As one of the pioneering manufacturers in variable area (VA) flow meter (rotameter) technology, Brooks Instrument has created a diverse and proven portfolio of gas flow meters, installed and in use across virtually every industry. From inline flow meters to low volume flow meters, Brooks offers high-performance gas and water variable area flow meter technology for the broadest range of industrial flow meter applications.

This broad portfolio of industrial flow meters includes armored metal and glass tube mechanical flow meters, each engineered to provide years of repeatable, reliable measurement of gas and liquid flow rates. They feature:

Reliable, easy-to-read displays on all mechanical flow meter types — gas, fluid and flow meters for water
Fail-safe inline flow indication under any circumstance
Integral flow controller to compensate for varying pressures
Materials and designs to suit multiple pressure ranges and chemical compounds for industrial flow meters
Field-replaceable components and custom scales
Integration of optional flow switches, automated valves or alarms

Trust the expertise of the Brooks Instrument team for valuable insight on the right fluid flow meter for your needs. Talk to us for more on our range of industrial flow meter types for gas and water, and see why Brooks Instruments leads the world in variable area flow meters.

Key Applications

Basic liquid (including water) or gas flow measurement
Rotating equipment flow measurement
Process analyzers
High-pressure flow on offshore oil platforms
Chemical injection
Purge liquid or gas metering

Component datasource missing. Select a datasource for this component.

Brooks MT3809G variable area flow meter cutaway

MT3809 with Explosion Proof Housing, Variable Area Flow Meter -

Why Use a Rotameter (Variable Area Flow Meter) to Measure Gas or Liquid Flow

What is a rotameter? A rotameter or variable area flow meter is an industrial flow meter that measures the volumetric flow of liquids and gases. There is no difference between a rotameter and a flow meter, and these terms are interchangeable. Inside a flow meter, a gas or liquid moves a float until it reaches equilibrium — the technique to measure the flow rate. Variable area flow meters are used across a wide range of industrial applications because they are an economical and reliable way of measuring very low to high flow rates. Brooks Instrument industrial flow meter experts have identified six key reasons industrial users choose variable area flow meters.

Read Application Note

Oil, gas, fuel mixtures, natural gas, specialty gas

Variable Area Flow Meter Approved for Hazardous Areas Used in Offshore Oil Drilling

Offshore oil platforms require accurate flow measurement to pump drilling mud at controlled, high pressures through the drill pipe to cool and lubricate the drill bit. A Brooks Instrument metal tube variable area flow meter enables consistent, repeatable pumping of drill mud under these severe process conditions.

Read Application Note