Macnaught MX75 Series Model 3” Digital Flow Meter
Macnaught MX75 Series Model 3” Digital Flow Meter

Macnaught MX75 Series Model 3” Digital Flow Meter

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Macnaught MX75 Series Model 3” Digital Flow Meter are suitable for flows between 5-194 GPM. The 3” Digital Flow Meters have an accuracy of +/- 0.5% and provides exceptional levels of reliability and durability.

Macnaught’s Positive Displacement Flow Meters are suitable for a wide range of industrial applications including fuel and oil distribution, corrosive chemicals, solvent measurement, and high-pressure applications to name a few. Macnaught offers Positive Displacement Flow Meters featuring Oval Gear technology.

The measuring principle includes two high precision toothed oval gears, which are driven by the flow of the medium and mesh with each other: in presence of a flow, defined volumes of fluid are transported through the meter for each rotation of oval gears pair. As the flow rate increases, so does the rotational speed of the rotors.

The number of gear rotations is a measure of the amount of fluid that has passed through the meter; each rotation is detected by a sensor and the volume is calculated using a conversion factor (K factor). Figure 1: Macnaught Positive Displacement Flow Meter operation.

Macnaught MX75 Series Features

  • Latest Meter Technology
  • Modular Design allows for design flexibility
  • Solid Billet Construction
  • Programmable Digital Display w varied output options


  • High accuracy and repeatability
  • High accuracy and repeatability
  • Suitable for viscous fluids
  • Cost-effective
  • Accuracy unaffected by changes in viscosity
  • Requires minimal maintenance
  • Ease of installation
  • Exceptional turn-down ratio
Another Article:

Macnaught MX75 Series Specification

Materials of Construction
Meter Body Cast Aluminium (6061) Cast Aluminium (6061)
Rotor Aluminium (6061) Aluminium (6061)
Seals Fluorocarbon (FKM) PTFE encapsulated (FEP)
Technical Specifications
Operating Temperature -40 – 120ºC -40 – 120ºC
Range -40 – 248ºF -40 – 248ºF
Max. Operating 175 psi 175 psi
Pressure 12 bar 12 bar
Accuracy +/- 0.5% +/- 0.5%
Repeatability +/- 0.03% +/- 0.03%
Nominal K-Factor 9.76 Pulses/Gallon 9.76 Pulses/Gallon

Download Data Sheet: Series MX75 3” Digital Flow Meters

Ref: macnaughtusa.com

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