Flow Meters
Flowmeters for monitoring systems flow available in panel-mounting or in-line styles for easy installation.
King Instruments’ Acrylic Tube Flow Meters’ economical machined cast acrylic block construction makes these flowmeters great for OEM use. Direct reading scales have white screen printed backs to enhance scale readability. Available in panel-mounting or in-line styles for easy installation.
Blue-White flow meters are offered in a several styles that are suitable for a wide variety of applications.
Benefits of Rotameter Flowmeters for Commercial RO Systems
- Monitor the Flow Rate of Any Water Stream in a Water Treatment System
- Dual Rated for GPM & LPM
- Available in Panel Mounted or In-Line Installation Style
King Rotameter Flow Meters
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Blue-White F-550 Acrylic Block Panel Mount Rotameters, Dual Scale (GPM & LPM)
- Durable, highly polished, one piece meter body.
- Bulkhead nuts attach directly to inside panel.
- Direct reading permanent scale.
- White back reflector for easy reading.
- Optional flow control needle-type adjustment valve.
- 316 stainless, PTFE or Hastelloy floats and float guides.
- Acceptable in direct sunlight applications.
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Model No. |
Conn. (in.) |
Range (GPM) |
Type |
Mounting Type |
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F-55250L |
¼” |
0.025-0.250 |
Acrylic Block |
Panel Mount |
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F-53375L |
⅜” |
0.1-1 |
Acrylic Block |
Panel Mount |
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F-55376L |
⅜” |
0.2-2 |
Acrylic Block |
Panel Mount |
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F-55500L |
½” |
0.5-5 |
Acrylic Block |
Panel Mount |
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F-55750L |
¾” |
1-10 |
Acrylic Block |
Panel Mount |
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F-55005L |
1” |
1-5 |
Acrylic Block |
Panel Mount |
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F-55010L |
1” |
1-10 |
Acrylic Block |
Panel Mount |
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F-55015L |
1” |
1-15 |
Acrylic Block |
Panel Mount |
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F-55200L |
1” |
2-20 |
Acrylic Block |
Panel Mount |
Blue-White F-300 Pitot Tube Acrylic Clamp-On Insertion Mount, Saddle Rotameters, Dual Scale (GPM & LPM)
- Horizontal Flow
- Well suited for closed pipe installations
- Easy to read dual scale (GPM / LPM), screen printed on both sides of the meter body
- Acceptable for outdoor installations (direct sunlight okay)
- Pitot Tube (impact tube) design makes it easy to install on existing pipe
- One piece, machined acrylic meter body, annealed for added strength and chemical resistance
- Included SS clamps and gasket seal
- For use on PVC or Copper Pipes (refer to literature)
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Model No. |
Conn. (in.) |
Range (GPM) |
Type |
Mounting Type |
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F-30100P |
1” Saddle |
5-35 |
Pilot Tube Acrylic |
Saddle |
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F-30150P |
1 ½” Saddle |
20-100 |
Pilot Tube Acrylic |
Saddle |
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F-30200P |
2” Saddle |
40-150 |
Pilot Tube Acrylic |
Saddle |
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F-30600P |
6” Saddle |
250-1050 |
Pilot Tube Acrylic |
Saddle |
Blue-White F-400N Acrylic Tube In-Line Rotameters, Dual Scale (GPM & LPM)
- Tough machined acrylic meter body, highly polished to a clear finish.
- Direct reading permanent scale.
- White or yellow back reflector for easy reading.*
- FNPT adapters with high grade Viton o-ring seals and aluminum “stress ring” thread supports.
- 316 stainless steel or Hastelloy rod guided floats.
- Acceptable in direct sunlight applications..
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Model No. |
Conn. (in.) |
Range (GPM) |
Type |
Type |
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F-40250LN-4 |
¼” FNPT |
0.025-0.25 |
Acrylic Tube |
In-Line |
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F-40375LN-6 |
⅜” FNPT |
0.1-1 |
Acrylic Tube |
In-Line |
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F-40500LN-6 |
⅜” FNPT |
0.5-5 |
Acrylic Tube |
In-Line |
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F-40375LN-8 |
½” FNPT |
0.1-1 |
Acrylic Tube |
In-Line |
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F-40376LN-8 |
½” FNPT |
0.2-2 |
Acrylic Tube |
In-Line |
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F-40500LN-8 |
½” FNPT |
0.5-5 |
Acrylic Tube |
In-Line |
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F-41017LN-12 |
¾” FNPT |
1.0-17 |
Acrylic Tube |
In-Line |
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F-41000LN-12 |
¾” FNPT |
2.0-20 |
Acrylic Tube |
In-Line |
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F-40750LN-16 |
1” FNPT |
1.0-10 |
Acrylic Tube |
In-Line |
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F-41017LN-16 |
1” FNPT |
1.0-17 |
Acrylic Tube |
In-Line |
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F-41000LN-16 |
1” FNPT |
2.0-20 |
Acrylic Tube |
In-Line |
Blue-White F-440 Polysulfone Molded Rotameter, Dual Scale (GPM & LPM)
- Tough Polysulfone meter body resists high temperatures and pressures
- Compact size for tight installation spaces
- 2” scale length
- In-line or panel mount configurations available (for vertical installation)
- Optional integral flow adjustment valve
- Standard Models: 316 SS guide rod
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Model No. |
Conn. (in.) |
Range (GPM) |
Type |
Type |
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F-44375L-8 |
1/2" MNPT |
0.1-1 |
Polysulfone Molded |
In-Line |
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F-44376LE-8 |
1/2" MNPT |
0.2-2 |
Polysulfone Molded |
Panel Mount |
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F-44376LE-6 |
3/8" MNPT |
0.2-2 |
Polysulfone Molded |
Panel Mount |
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F-44500LA-8 |
1/2" MNPT |
0.5-5 |
Adjustable Polysulfone |
Panel Mount |
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F-44500L-8 |
1/2" MNPT |
0.5-5 |
Polysulfone Molded |
In-Line |
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F-44500LE-8 |
1/2" MNPT |
0.5-5 |
Polysulfone Molded |
Panel Mount |
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F-44750LE-8 |
1/2" MNPT |
1.0-10 |
Polysulfone Molded |
Panel Mount |
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F-44750L-12 |
3/4" MNPT |
1.0-10 |
Polysulfone Molded |
In-Line |
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F-44750LE-12 |
3/4" MNPT |
1.0-10 |
Polysulfone Molded |
Panel Mount |
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F-44330LE-8 |
1/2" MNPT |
3.0-30 |
Polysulfone Molded |
Panel Mount |
Blue-White F-450 Flow Meters, Polysulfone Molded Rotameter, Dual Scale (GPM & LPM)
- Available in 3/8”, 1/2”, and 3/4” MNPT sizes.
- Injection molded, chemical resistant Polysulfone.
- Quik Loc (half union) connectors.
- Units available in configurations for in-line and panel mount installation.
- Optional flow control needle metering valve.
- Dual scale: Gallons per minute (GPM) and Liters per minute (LPM).
- Choice of 4” or 6” scale.
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Model No. |
Conn. (in.) |
Range (GPM) |
Type |
Type |
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F-45375L-8 |
1/2" MNPT |
0.1-1 |
Polysulfone Molded |
In-Line |
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F-45375L-6 |
3/8" FNPT |
0.1-1 |
Polysulfone Molded |
In-Line |
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F-45376LE-8 |
1/2" MNPT |
0.2-2 |
Polysulfone Molded |
Panel Mount |
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F-45376L-6 |
3/8" FNPT |
0.2-2 |
Polysulfone Molded |
In-Line |
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F-45500LE-8 |
1/2" MNPT |
0.5-5 |
Polysulfone Molded |
Panel Mount |
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F-45500L-6 |
3/8" FNPT |
0.5-5 |
Polysulfone Molded |
In-Line |
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F-45750LE-8 |
1/2" MNPT |
1.0-10 |
Polysulfone Molded |
Panel Mount |
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F-45750LE-12 |
3/4" MNPT |
1.0-10 |
Polysulfone Molded |
Panel Mount |
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F-45750LA-12 |
3/4" MNPT |
1.0-10 |
Adjustable Polysulfone |
Panel Mount |
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F-45750L-12 |
3/4" MNPT |
1.0-10 |
Polysulfone Molded |
In-Line |
Blue-White F-451N High Volume Polysulfone Molded Rotameter, Dual Scale (GPM & LPM)
- A one piece impact, heat and chemical resistant Polysulfone meter body; Polysulfone adapters 2" and 1"; PVC 1-1/2".
- Calibrations in gallons per minute, liters per minute and SCFM.
- Clear Polycarbonate shielded model available.
- Direct reading, permanent scales.
- Wear and corrosion resistant internal parts.
- FKM O-ring seals.
- FNPT, inline MNPT or 90° elbow connections.
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Model No. |
Conn. (in.) |
Range (GPM) |
Type |
Type |
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F-451006LHN |
1" FNPT |
0.5-6 |
Polysulfone Molded In-Line |
In-Line |
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F-451001LHN |
1" FNPT |
1.0-10 |
Polysulfone Molded In-Line |
In-Line |
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F-451001LHNE |
1" MNPT |
1.0-10 |
Polysulfone Molded In-Line |
Panel Mount |
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F-451002LHN |
1" FNPT |
2.0-20 |
Polysulfone Molded In-Line |
In-Line |
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F-451002LHNE |
1" MNPT |
2.0-20 |
Polysulfone Molded In-Line |
Panel Mount |
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F-451003LHKN |
1" FNPT |
3.0-30 |
Polysulfone Mld. For Highly Corrosive Applications |
In-Line |
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F-451003LHN |
1" FNPT |
3.0-30 |
Polysulfone Molded In-Line |
In-Line |
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F-451003LHNE |
1" MNPT |
3.0-30 |
Polysulfone Molded In-Line |
Panel Mount |
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F-451003LHN-24 |
1 1/2" FNPT |
3.0-30 |
Polysulfone Molded In-Line |
In-Line |
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F-451004LHN |
1" FNPT |
4.0-40 |
Polysulfone Molded In-Line |
In-Line |
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F-451004LHNE |
1" MNPT |
4.0-40 |
Polysulfone Molded In-Line |
Panel Mount |
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F-451004LHN-24 |
1 1/2" FNPT |
4.0-40 |
Polysulfone Molded In-Line |
In-Line |
Note: Please contact Applied Membranes Inc. for additional pricing and availability on models that are not listed.
Rotameter Flowmeter Features
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Blue-White Variable Area flowmeters are offered in several styles for a wide variety of applications. Check the ‘details’ tab for information on each product line. |
Applications for Rotameter Flowmeters
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Related Commercial RO Products
- King 7520 Panel Mounted Rotameter Flowmeter Specifications
- King 7520 Panel Mounted Rotameter Flowmeter Installation Instructions
- King 7510 In-Line Rotameter Flowmeter Specifications
- King 7510 In-Line Rotameter Flowmeter Installation Instructions
- Blue-White F-300 Rotameter Flowmeter Technical Data Sheet
- Blue-White F-400 Rotameter Flowmeter Technical Data Sheet
- Blue-White F-400 Rotameter Flowmeter Instruction Manual
- Blue-White F-440 Rotameter Flowmeter Technical Data Sheet
- Blue-White F-440 Rotameter Flowmeter Instruction Manual
- Blue-White F-450 Rotameter Flowmeter Technical Data Sheet
- Blue-White F-450 Rotameter Flowmeter Instruction Manual
- AMI Commercial Components Catalog