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Aluminium oval-gear flowmeter with 1/2 FNPT ports

GPI

GPI FLOMEC LM51DN Flowmeter Oval Gear 1/2 FNPT 1500 psi

SKU CH-5MWG-C2E3D

Oval-gear electronic flowmeter measures oil with ±0.5 % accuracy, 1/2 in FNPT connection and 1500 psi rating

  • ±0.5 % accuracy for precise oil dispensing
  • 1500 psi rating handles high-pressure lube systems
  • 1/2 in FNPT connection fits standard plumbing
  • 4 °F to 140 °F range suits varied shop conditions
  • CE certified meter meets European safety standards

Precision Lube Meter

The FLOMEC LM51DN is an electronic oval-gear flowmeter built for measuring oil-based fluids in industrial and automotive lubrication systems. Its aluminum housing and LCP rotors deliver +/- 0.5 percent accuracy across a viscosity range up to 1,000 cps. The meter operates between -4 and 140 degrees F and handles pressures up to 1500 psi through a 1/2 inch FNPT connection.

Maintenance Teams and Fluid Handlers

This meter suits technicians who need reliable volumetric totals in gallons or litres for dispensing or inventory control. It is not intended for water-based chemicals, high-temperature media above 140 degrees F, or fluids exceeding the stated viscosity limit. Buyers requiring a different port size or a non-aluminum wetted path should look at other models.

CE Certified Construction

CE certification confirms compliance with relevant European safety and electromagnetic standards for industrial equipment. The Buna-N seals and stainless-steel shaft extend service life in oil environments, while the Alnico components support consistent rotor coupling. No additional software or accessories are bundled with the meter.

Highlights

  • ±0.5 % accuracy for precise oil dispensing
  • 1500 psi rating handles high-pressure lube systems
  • 1/2 in FNPT connection fits standard plumbing
  • 4 °F to 140 °F range suits varied shop conditions
  • CE certified meter meets European safety standards

Specifications

BrandFLOMEC

Questions about this item

What thread size and type must my piping have to connect the 1/2 in FNPT inlet?

The meter has a 1/2 in FNPT connection, so your pipe or hose fitting must be 1/2 in MNPT to thread directly into it.

Will the aluminum housing and Buna-N seals handle the same 1500 psi pressure as my existing steel line?

The meter is rated for 1500 psi, and its aluminum housing with Buna-N seals is designed for that pressure with compatible oils up to 1000 cps viscosity.

How do I verify the +/- 0.5% accuracy after installation?

Dispense a known volume into a calibrated container and compare the meter's gallon or liter readout; it should fall within half a percent of the actual amount.

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