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F-450N Polysulfone Molded In Line Flow Meter

USA Toll Free: 1-800-730-0302 Tel: 416-240-1920 -

F-450N Polysulfone Molded In Line Flow Meter

Pipe sizes 3/8" female NPT 1/2" , 3/4" male NPT

Flow from Liquid: 0.1 to 10 GPM (.4 to 40 LPM) Air: 1 to 48 SCFM (2 to 80 M³/hr)

Panel Mount, Adjustable, and Brass Adapters Available


  • Polysulfone meter body resists high temperatures and pressures.

  • 316 SS or Hastelloy rod guided float.

  • Taller size for better scale readability

  • Direct reading permanent scale.

  • Optional flow control needle valve.

  • Not recommended for direct sunlight.

  • In-Line (vertical) mount only.

  • Available OEM options: Private labeling, custom calibrations and custom materials.

Adapter Options:

  • 3/8″ female NPT and 1/2″ , 3/4″ male NPT Inline units.

  • 3/8″ female NPT and 1/2″ , 3/4″ male NPT panel mount units.

  • 3/8″ female NPT and 1/2″ , 3/4″ male NPT panel mount adjustable units.

  • Brass Adapter Options: 1/2” and 3/4: M/NPT and sweat .


Max. Working Pressure:

175 psig (12.0 bar) @ 70° F (21° C)

Max. Fluid Temperature:

Standard Models: 212° F (100° C) @ 0 PSI
SolarMeter®: 240° F (115° C) @ 0 PSI

Full Scale Accuracy: +/- 4%

Meter Body Material: Polysulfone

Adapter Material:

Standard Models: Polysulfone
SolarMeter®: Brass

Union Nuts:

Standard Models: Polysulfone
SolarMeter®: Anodized Aluminum

Guide Rod Material: 316 SS or Hastelloy C-276

Float Material: 316SS or PTFE (varies per model)

O-ring Material: FKM (Optional EP)

Max Pressure Drop: 2 PSI

Approx. Shipping Weight: 1/2 lb. (0.23 kg)

Model Numbers

Standard Models for Liquid

Tech. Data Sheet (PDF) (PN 85000-091)

Standard Models for Air

Tech. Data Sheet (PDF) (PN 85000-091)

K-Series – Specially Equipped Models for Liquid

Tech. Data Sheet (PDF) (PN 85000-091)

Standard Models for Liquid – Brass Adapters

Tech. Data Sheet (PDF) (PN 85000-091)

About Us

Metex Corporation Limited has been providing superior products and services to the process control, chemical treatment, waste water, industrial and manufacturing industries for over 25 years. It is our goal to continually provide our customers with the best possible equipment, technology, and service.


Our Products

Dataloggers, sensors, pumps, recorders, hand held instruments, flow instrumentation, level controls, valves, instrumentation, containers, tanks, transmitters, data loggers, digital indicators, mixers and agitators, pressure intrumentation, analyzers and controllers for a variety of industrial applications such as water quality, pH/ORP and more.

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Water Analyzers and Controllers, Wireless Products, Corrosion Monitoring Equipment, Cooling Tower and Boiler Controllers, a wide variety of Pumps, Valves, Dataloggers and Recorders, HVAC, Instrumentation, Skids and Systems, Containers and Tanks from world leading manufacturers are products you will find on this site.

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