•  Gallon ModelsLitre Models
    Model DesignationQM240NQM150N
    Part Number139121-06139121-07
    Unit of MeasureU.S. GallonLitre
    Flow Range2 to 40 GPM8 to 150 LPM
    Typical Accuracy: Diesel+1/2% to -1/4% (2 to 40 GPM)
    Typical Accuracy: Unleaded-1/2% to -2% (2 to 20 GPM / 8 to 75 LPM)
    -1/2% to -3% (2 to 40 GPM / 8 to 150 LPM)
    Operating Temperature-40° to 125° F / -40° to 52° C (-20° to 125° F UL)
    Maximum Working Pressure50 PSIG / 3.4 Bar
    Wetted Materials:
    Housing / Cover / FittingsAluminum
    RotorsPPS (Polyphenylene Sulfide)
    Shafts / StrainerStainless Steel
    SealsNBR (Nitrile Butadiene Rubber)
    Mag-DriveAcetal, Stainless Steel and Neodymium (Nickel Plated)
    Inlet/Outlet Ports1" NPT (female)
    1” NPT (female)
    Pressure Drop (psi)0 @ 5 GPM / 19 LPM
    2.0 @ 20 GPM / 75 LPM (3.0 Diesel)
    4.5 @ 40 GPM / 150 LPM (7.0 Diesel)
    Maximum Batch Total999.99999
    Maximum Cumulative Total9,999,999.9099,999,999
    TechnologyPositive Displacement Oval Gear
    ApprovalsUL 25
  • QM240 Meter Dims
  • QM Meter Kits-and-Acc
    A139500-01KIT, SEAL: Includes(1) housing O-ring, (2) fitting O-rings, (1) back plate O-ring
    B139500-02KIT, FITTING, 1” NPT: Includes (2) fittings, (2) fitting O-rings, (1) strainer, attaching hardware
    C139500-03KIT, FITTING, 1” BSPP: Includes (2) fittings, (2) fitting O-rings, (1) strainer, attaching hardware
    D139500-04KIT, KNOB ASSEMBLY: Includes (1) knob assembly
    E139500-05KIT, COUNTER ASSEMBLY: Includes (1) counter assembly, attaching hardware
    F139500-06KIT, ROTOR: Includes (1) rotor set
    G139500-07KIT, COVERPLATE ASSEMBLY, GAL: Includes (1) assembled coverplate (gears, mag drives), housing seal, attaching hardware
    H139500-08KIT, COVERPLATE ASSEMBLY, LITRE: Includes (1) assembled coverplate (gears, mag drives), housing seal, attaching hardware
    I139500-09KIT, CALIBRATION SCREW: Includes (1) calibration screw , (1) O-ring
    J139500-10KIT, BACK PLATE: Includes (1) back plate, (1) O-ring, attaching hardware
    K139500-11KIT, TOP COVER, GALLON: Includes (1) top cover w/gallon decals, attaching hardware
    L139500-12KIT, TOP COVER, LITRE: Includes (1) top cover w/litre decals, attaching hardware
    M139500-13KIT, MIDDLE COVER: Includes (1) middle cover, attaching hardware
    N139500-14KIT, STRAINER: Includes (1) strainer
    -139500-15KIT, UNLEADED FUEL, QM240: Not shown
  • Also available with GPRO Fuel Transfer Pumps - Click Here to Learn More
    pro20-115ad_qm240g8n-360 pro35-115ad_qm240g8n


The FLOMEC® QM240 and QM150 Series Fuel Meters are extremely accurate, flexible and reliable. So accurate in fact, they "Make others look like they're just guessing".

Here's why:

  • HIGH PRECISION → 20X More Precise on GPRO 20GPM pump, 4X Higher Accuracy: 1/2% Overall
  • MORE CAPACITY → 40GPM VS 30GPM, 33% More Flowmeter Performance
  • NO LEAKS → NO SEALS → Frictionless Magnetic Drive Technology
  • ACCURATE LOW END → 3x Better - Accurate to 2GPM vs 6GPM
  • LOW PRESSURE DROP → 4psi vs 12psi Pressure Drop at 35GPM (1psi at 10GPM)
  • MORE FLEXIBLE → Versatile Rotatable Mount
  • NO CALIBRATION → Positive Displacement Oval Gear Technology - NO Calibration Required

To order this meter contact your local distributor, call (800) 835-0113 or email


  • The UL Approved version of this meter is for use only with thin viscosity petroleum fuels such as gasoline, gasoline-ethanol blends at levels designated as "gasohol" (E10 maximum), diesel and kerosene.
  • The non-UL Approved version of this meter is for use only with diesel fuel and kerosene.


Download Flyer (ENGLISH)
Download Flyer (FRENCH)
Download Flyer (SPANISH)

Download Owner's Manual (ENGLISH)
Download Owner's Manual (FRENCH)
Go To Top
Great Plains Industries