1/2 in Variable Area Flowmeters - Grainger Industrial Supply

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Variable Area Flowmeters

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Variable area flowmeters (rotameters) measure the flow rate of chemically compatible media (e.g. gases, oils, liquids) moving through a system. Flowing media pushes the meter's float or spring-loaded indicator to a value on a scale to provide a flow rate measurement.

Connection Size

Inline Flowmeters for Water

Inline variable area flowmeters for water measure the flow rate of water and water-based liquids traveling through a system. Inline meters and sensors are installed level with the system's piping, where media travels directly through the instrument. They're used in applications with limited space, minimize the impact on system line pressure, and require minimal plumbing alterations.

PPSU Body


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PSU Body


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Brass Body


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Aluminum Body


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Stainless Steel Body


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Inline Flowmeters for Oils

Inline variable area flowmeters for oils measure the flow rate of liquids traveling through a system. Inline meters and sensors are installed level with the system's piping, where media travels directly through the instrument. They're used in applications with limited space, minimize the impact on system line pressure, and require minimal plumbing alterations.

PSU Body


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Aluminum Body


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Inline Flowmeters for Air & Compressed Gases

Inline variable area flowmeters for air and compressed gases measure the flow rate of media traveling through a system. Inline meters and sensors are installed level with the system's piping, where media travels directly through the instrument. They're used in applications with limited space, minimize the impact on system line pressure, and require minimal plumbing alterations.

Aluminum Body


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Inline Flowmeters for Water with Remote Output

Inline variable flowmeters for water with remote output measure the flow rate of water and water-based liquids traveling through a system. Remote output sends signals to alarms, warning lights, or programmable logic controllers (PLC) when media stops or starts flowing. Inline meters and sensors are installed level with the system's piping, where media travels directly through the instrument. They're used in applications with limited space, minimize the impact on system line pressure, and require minimal plumbing alterations.