Neptune 4D-MD Meter for LPG Dispensers

The Neptune 1″ Type 4D-MD meter has been specifically designed for the custody transfer of Liquefied Propane and Butane gas (LPG). This meter utilizes the oscillating piston positive displacement principle.

The standard 4D-MD meter comes with

  • Base meter choice of 600 series mechanical totalizing register with resettable counter, 800 series mechanical printer register, Veeder Root mechanical register, E1000 electronic register or MidCom MCR09 electronic register
  • Differential control valve combination vapor eliminator/strainer
  • Continuous bleed pressure relief valve
  • Choice of pulse output for remote totalizing

Available with Automatic Temperature Compensator (ATC)


  • Accuracy and reliability in compact package
  • Oscillating piston with hard, low friction Nituff Teflon impregnated coating for long life
  • Smooth performance at low flow and high operating pressures
  • Rugged outer body components
  • Compact design
  • Suitable for a wide variety of installation configurations.


O&M Manual
Tech Sheet
Parts List