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Battery Powered Indicating Flow Meter For Rate or Total Flow

Digital Paddlewheel Meters

Article# FP2001-R

Digital Paddlewheel Meters FP2001-R FP2001-R

Discontinued, identical replacement RB-375MI-GPM2.

  • High Accuracy Digital Paddlewheel Technology
  • Pipe Sizes from 3/8 to 2"
  • Tamper Proof Factory Programming
  • Easy to Read 6-Digit LCD Display, Up to 4 Decimal Places
  • Battery Operated (2 "AAA" Batteries Included)
  • Very Low Pressure Drop
  • Total Reset Function Can be Disabled

FP2001-R Options de modèles

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

The FP2000 Series is designed to measure the flow of a fluid in a pipe. The meter is factory calibrated to any engineering units and displays the rate of flow, total or both (depending on the model selected) on a 6-digit LCD display. Two “AAA” batteries power the unit for up to one year. There are three models available: FP2000-R is a rate meter designed to measure and display the rate of flow; FP2000-T is a totalizer meter designed to measure and display the total flow; FP2000-RT is a rate/totalizer meter designed to measure and display both the rate of flow and the total flow.

Measuring accuracy requires a fully developed turbulent flow profile. Pulsating, swirling and other disruptions in the flow stream will affect accuracy. Flow conditions with a Reynolds Number greater than 4000 will result in a fully developed turbulent flow. A Reynolds Number less than 2000 is laminar flow and may result in inaccurate readings.

Reynolds Number Equation:
Reynolds Number=(3160 x Q x G)/(D x V)
   Q = Flow rate of the fluid in GPM
   G = Specific gravity of the fluid
   D = Pipe inside diameter in inches
   V = Fluid viscocity in centepoise

Minimum Straight Pipe Length Requirements
The meter’s accuracy is affected by disturbances such as pumps, elbows, tees, valves, etc., in the flow stream. Install the meter in a straight run of pipe as far as possible from any disturbances. The distance required for accuracy will depend on the type of disturbance.
Disturbance Type Min
Inlet Pipe Length
Outlet Pipe Length
Flange 10x pipe ID 5x pipe ID
Reducer 15x pipe ID 5x pipe ID
90° Elbow 20x pipe ID 5x pipe ID
Two Elbows-1 Direction 25x pipe ID 5x pipe ID
Two Elbows-2 Directions 40x pipe ID 5x pipe ID
Pump or Gate Valves 50x pipe ID 5x pipe ID

Max Working Pressure: 20 bar (300 psi) at 21°C (70°F)
Max Fluid Temperature: 93°C (200°F) at 0 psi
Max Ambient Temperature: -10 to 43°C (14 to 110°F)
Full Scale Accuracy: ±2%
Power Requirement: 2 "AAA" batteries (included)
Enclosure: NEMA 4X (IP56)
Maximum Pressure Drop: 0.6 BAR (8 psi) (varies per model)
Approximate Shipping Wt: 0.91 kg (2 lb)
Materials of Construction
   Pipe Fitting: Polypropylene (FP2000 series) or PVDF (FP2100 series)
   Sensor, Paddlewheel, Axle: PVDF
   Sensor O-ring seals: FKM
   Enclosure: ABS
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