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Low Flow Polyproplene & TFE Liquid Flow Meters

Low Flow Polypropylene and TFE Liquid Flow Meters


Item# FPR301

In stock

Lead Time (If not in stock): 4 weeks
Low Flow Polypropylene and TFE Liquid Flow Meters FPR301 FPR301
  • Only One Moving Part
  • Field Replaceable Sensor
  • Excellent Low Flow Performance
  • Versatile Square Wave Signal

FPR301 Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Flow Range
Wetted Materials
Process Connection Size
Max Process Temperature
Max Operating Pressure
Output Signal
Supply Power
Process Connection Type

The FPR300 Series comprises versatile impeller flow meters in 3/8 to 1" nominal pipe size that employ jewel bearings for very low minimum flows. The 6 to 24 Vdc pulse output of these meters is compatible with many different types of control, including a full range of OMEGA rate displays and controls. The FPR300 Series body material is polypropylene, with transparent acrylic covers for visual flow indication. Polypropylene covers are available as an option. The FPR310 Series has TFE housing, TFE cover (not visual), PVDF rotor, and a ceramic shaft.

Accuracy: 1% FS
Max Temperature: 70°C (160°F)
Max Pressure: 10 bar (150 psi)
Power: 6 to 24 Vdc @ 2 mA
Output: NPN open collector


    FPR300 Series: Polypropylene
    FPR310 Series: TFE
    FPR300 Series: Acrylic, polypropylene (sold separately)
    FPR310 Series: TFE
Rotor: PVDF
    FPR300 Series: Nickel tungsten carbide
    FPR310 Series: zirconia ceramic, silicon
Bearings: Ruby
    FPR300 Series: EPDM
    FPR310 Series: FKM
Dimensions: 56 H x 104 L x 53 mm D (2.2 x 4.1 x 2.1")
Cable: 5.5 m (18')
Max Pressure Drop:
    FPR301, FPR311: 15 psi
    FPR302, FPR312: 20 psi
    FPR303, FPR313: 20 psi
    FPR304, FPR314: 20 psi
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Rated 5 out of 5 by from Solid flowmeter Good quality and easy to set up. I like the fact that you can see the paddlewheel through the clear plastic.
Date published: 2024-03-01
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Hi, Is it possible to use this meter with high viscous liquids like Antifrogen N?

Asked by: Yuxel
Thank you for your inquiry. Unfortunately, this flow meter has a limitation on viscosity. Best suggestion would be to use a positive displacement flow meter for any viscous liquids since it is independent of viscosity changes.
Answered by: Application Engineer JC
Date published: 2021-01-09

Can these be piped in vertical down flow ?

Asked by: Mennis
Thank you for your inquiry. Unfortunately, that will not be ideal, horizontal position is preferred. Although, in a vertical position, flow must go from floor to the ceiling to ensure full flow of pipe, if not, it will not be suitable for any of our flow meters.
Answered by: JC ENGR
Date published: 2020-12-04

Hello, Is it possible to use this in a vertical apllication (the chemical flowing straight up with a peristaltic pump)? Can this meter be used to detect lack of feed? Also, can it handle 15% sodium hypochlorite? Thank you

Asked by: Kyle 5
Thank you for your inquiry about the flow meter series. The flow meter can work in a vertical position and the flow must be pressurized and constant, not pulsating. It can meausre the flow rate of the liquid passing and as a courtesy, chemical compatibility is the responsibility of customers to check the liquid against the wetted materials of the flow meter. The flow meters in this series are chemically compatible.
Answered by: Application Engineer JC
Date published: 2022-11-08
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Low Flow Polypropylene and TFE Liquid Flow Meters
0 In Stock
Low Flow Polypropylene and TFE Liquid Flow Meters
0 In Stock
Replacement EPDM O-ring
0 In Stock
Polypropylene cover
1 In Stock
Replacement Bearings (two required)
0 In Stock
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