Macnaught MX40 Series Model 1½” Digital Flow Meters
Macnaught MX40 Series Model 1½” Digital Flow Meters

Macnaught MX40 Series Model 1½” Digital Flow Meters

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Macnaught MX40 Series Model 1½” Digital Flow Meters are suitable for flows between 2.6-66 GPM. The 1½” 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 MX40 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 MX40 Series Specification

  MX40F MX40S MX40P
Materials of Construction
Meter Body Aluminium (6061) Aluminium (6061) Stainless Steel (316)
Rotor PPS Stainless Steel (316) PPS
  Stainless Steel (316)
Seals Fluorocarbon (FKM) PTFE encapsulated (FEP) PTFE encapsulated (FEP)
Technical Specifications
Operating Temperature -40 – 80ºC -40 – 120ºC -40 – 80ºC (150ºC with high temp. rotors)
Range -40 – 176ºF -40 – 248ºF -40 – 176ºF (302ºF with high temp. rotors)
Max. Operating 1500 psi 1500 psi 1500 psi
Pressure 103 Bar 103 Bar 103 Bar
Accuracy +/- 0.5% +/- 0.5% +/- 0.5%
Repeatability +/- 0.03% +/- 0.03% +/- 0.03%
Nominal K-Factor 54.89 Pulses/Gallon 54.89 Pulses/Gallon 54.89 Pulses/Gallon

Ref: macnaughtusa.com

Download Data Sheet: Series MX40 1½” Digital Flow Meters

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