Key Instruments

Plastic Variable Area Flow Meters

Combining affordability with reliable flow measurement and control.

For many non-corrosive, low-pressure air, water and gas flow applications, it pays to use accurate instrumentation that provides highly repeatable results and is also durable and affordable. Key Instruments delivers that combination in our versatile line of plastic variable area oxygen flow meters. Durability is the result of precision-machined, one-piece, acrylic-body blocks that can handle demanding projects and mounting panels. Plus, configuration and customization options for scales, floats, fittings and control valves accommodate a variety of oxygen flow measurement applications, whether in the lab or the field.

KEY APPLICATIONS

Select the plastic variable area flow meter that best meets your project requirements.

PRODUCTS

Product Type

Machined Acrylic Flow Meter

Machined Acrylic Flow Meter

Molded Polycarbonate Flow Meter

Differentiator

Economical
QuickShip Available

Three Levels of Customization

Economical
QuickShip Available

Flow Range
(Full Scale Capacity)

Water

4 – 3700 ccm
.2 – 60 gph
.25 – 20 gpm
1 – 75 lpm

Air

100 -1000 ccm
0.04 – 4000 lpm
.1 – 200 scfh
.5 – 100 scfm

Call for Information

Water

5 – 300 ccm
.2 – 40 gph

Air

.5 – 100 lpm
.1 – 200 scfh

Accuracy

2-5% FS

Call for Information

± 4% FS

Max Temperature

65oC (150oF)

Call for Information

65oC (150oF)

Max Pressure

100 psig

Call for Information

100 psig

Seal Material

Buna-N O-rings w/Brass fittings or PVC fittings;
Viton O-rings w/303 SS fittings

Call for Information

Buna-N w/Brass fittings;
Viton® fluoroelastomer w/SS fittings

Process Connection Material

Brass;
303 Stainless Steel;
PVC FNPT Pipe Connections (Std).

Brass;
303 Stainless Steel;
PVC FNPT Pipe Connections (Std).

– –

Product Type

Machined Acrylic Flow Meter

Differentiator

Economical
QuickShip Available

Flow Range
(Full Scale Capacity)

Water

4 – 3700 ccm
.2 – 60 gph
.25 – 20 gpm
1 – 75 lpm

Air

100 -1000 ccm
0.04 – 4000 lpm
.1 – 200 scfh
.5 – 100 scfm

Accuracy

2-5% FS

Max Temperature

65oC (150oF)

Max Pressure

100 psig

Seal Material

Buna-N O-rings w/Brass fittings or PVC fittings;
Viton O-rings w/303 SS fittings

Process Connection Material

Brass;
303 Stainless Steel;
PVC FNPT Pipe Connections (Std).

Product Type

Machined Acrylic Flow Meter

Differentiator

Three Levels of Customization

Flow Range
(Full Scale Capacity)

Call for Information

Accuracy

Call for Information

Max Temperature

Call for Information

Max Pressure

Call for Information

Seal Material

Call for Information

Process Connection Material

Brass;
303 Stainless Steel;
PVC FNPT Pipe Connections (Std).

Product Type

Molded Polycarbonate Flow Meter

Differentiator

Economical
QuickShip Available

Flow Range
(Full Scale Capacity)

Water

5 – 300 ccm
.2 – 40 gph

Air

.5 – 100 lpm
.1 – 200 scfh

Accuracy

± 4% FS

Max Temperature

65oC (150oF)

Max Pressure

100 psig

Seal Material

Buna-N w/Brass fittings;
Viton® fluoroelastomer w/SS fittings

Process Connection Material

– –