Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
GPI Mechanical Fuel Meter: Fuel Meter, Inline, Positive Displacement, Aluminum - Oval Gear Totalizers
GPIOval Gear Totalizers

GPI Mechanical Fuel Meter: Fuel Meter, Inline, Positive Displacement, Aluminum

The GPI Mechanical Fuel Meter (SKU 812N59, MPN QM40G8N) is an inline, positive displacement oval gear totalizer constructed from aluminum with 1 in FNPT connections and a PPS body. It features a mechanical display…

SKU 3G-OTH-90303

Brand
GPI
Item
Mechanical Fuel Meter: Fuel Meter, Inline, Positive Displacement, Aluminum
Category
Oval Gear Totalizers
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineer
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Technical Specifications

GPI
Manufacturer Part Number
QM40G8N
Type
Inline, Positive Displacement, Aluminum, FNPT, PPS
FNPT
1 in
Accuracy
+/-0.5%
Output Type
Standard Frequency Pulse
Display Type
Mechanical
View Full Spec Sheet

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

GPI Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The GPI Mechanical Fuel Meter (SKU 812N59, MPN QM40G8N) is an inline, positive displacement oval gear totalizer constructed from aluminum with 1 in FNPT connections and a PPS body. It features a mechanical display and delivers +/-0.5% accuracy with a standard frequency pulse output.

Frequently Asked Questions

What is the GPI Mechanical Fuel Meter used for?

The GPI Mechanical Fuel Meter is used for inline flow measurement of fuels in industrial, agricultural, and fleet refueling applications. Its positive displacement oval gear design provides accurate totalization, making it suitable for transfer, dispensing, and inventory monitoring of diesel, gasoline, and similar fluids.

What are the specifications of the GPI QM40G8N fuel meter?

The GPI QM40G8N is an inline positive displacement oval gear totalizer with a mechanical display, +/-0.5% accuracy, and standard frequency pulse output. It has a 1 in FNPT connection, an aluminum body, and a PPS housing. It is designed for fuel metering in demanding environments.

Where to buy the GPI QM40G8N fuel meter worldwide?

You can source the GPI QM40G8N fuel meter worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we provide reliable sourcing and supply for this GPI model.

How to install the GPI mechanical fuel meter?

Install the GPI fuel meter inline with 1 in FNPT piping, ensuring flow direction matches the arrow on the body. Use thread sealant on connections and avoid overtightening. Mount in a protected location away from extreme vibration. For pulse output wiring, refer to the manufacturer's manual. Always follow local fuel-handling safety codes.

Used in

Common applications for GPI
Agricultural refueling — GPI M-150S-AU bung-mount pump for diesel transfer from drums to tractors
Fleet maintenance — GPI V25-012AD pump with hose and nozzle for refueling service trucks
Construction site fueling — GPI V25-012PO pump-only unit integrated into portable tank systems
DEF dispensing — GPI 180000-01 AC pump for Diesel Exhaust Fluid transfer in workshops
Fuel inventory tracking — GPI M30-G8N mechanical flowmeter for totalizing gasoline consumption
Kerosene bulk transfer — GPI M30-L8N flowmeter in liters for heating oil delivery verification

GPI Products

3G Electric supplies GPI oval gear totalizers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Similar products

Matched by specification & description
GPI Mechanical Flowmeter: Fuel Meter, B20/E15/Gasoline/Kerosene, Aluminum, 1 in FNPT, FNPT, Gallons (MPN M30-G8N). Key specifications — Brand: GPI; Accuracy: 2%; Unit Of Measure: Gallons.
GPI
GPI Mechanical Flowmeter: Fuel Meter, B20/E15/Gasoline/Kerosene, Aluminum, 1 in FNPT, FNPT, Gallons (MPN M30-G8N). Key specifications — Brand: GPI; Accuracy: 2%; Unit Of Measure: Gallons.
GPI Mechanical Flowmeter: Fuel Meter, B20/E15/Gasoline/Kerosene, Aluminum, 1 in FNPT, FNPT, Liters (MPN M30-L8N). Key specifications — Brand: GPI; Accuracy: 2%; Unit Of Measure: Liters.
GPI
GPI Mechanical Flowmeter: Fuel Meter, B20/E15/Gasoline/Kerosene, Aluminum, 1 in FNPT, FNPT, Liters (MPN M30-L8N). Key specifications — Brand: GPI; Accuracy: 2%; Unit Of Measure: Liters.
GPI Electronic Flowmeter: Commercial Grade Meter, Turbine, 1 in FNPT, 1 in Connection Size, FNPT (MPN A1Q9GMA100NA1). Key specifications — Product Type: Commercial Grade Meter; Rotor Material: Nylon; Accuracy %: +/-1.5%; Output Type: 4-20 mA; Brand: GPI; Unit Of Measure: Liters; Display Type: Digital; Termination: Not Listed.
GPI
GPI Electronic Flowmeter: Commercial Grade Meter, Turbine, 1 in FNPT, 1 in Connection Size, FNPT (MPN A1Q9GMA100NA1). Key specifications — Product Type: Commercial Grade Meter; Rotor Material: Nylon; Accuracy %: +/-1.5%; Output Type: 4-20 mA; Brand: GPI; Unit Of Measure: Liters; Display Type: Digital; Termination: Not Listed.
GPI Electronic Flowmeter: Fuel Meter, Turbine, 1 in FNPT, 1 in Connection Size, FNPT, 3 gpm – 30 gpm (MPN 01A31GM). Key specifications — Product Type: Fuel Meter; Rotor Material: Nylon; Accuracy %: +/-2.5%; Output Type: 4-20 mA; Brand: GPI; Unit Of Measure: Gallons; Display Type: Digital; Termination: Not Listed.
GPI
GPI Electronic Flowmeter: Fuel Meter, Turbine, 1 in FNPT, 1 in Connection Size, FNPT, 3 gpm – 30 gpm (MPN 01A31GM). Key specifications — Product Type: Fuel Meter; Rotor Material: Nylon; Accuracy %: +/-2.5%; Output Type: 4-20 mA; Brand: GPI; Unit Of Measure: Gallons; Display Type: Digital; Termination: Not Listed.
GPI Electronic Flowmeter: Fuel Meter, Turbine, 1 in FNPT, 1 in Connection Size, FNPT, 14°F to 130°F (MPN 01A31LM). Key specifications — Product Type: Fuel Meter; Rotor Material: Nylon; Accuracy %: +/-2.5%; Output Type: 4-20 mA; Brand: GPI; Unit Of Measure: Liters; Display Type: Digital; Termination: Not Listed.
GPI
GPI Electronic Flowmeter: Fuel Meter, Turbine, 1 in FNPT, 1 in Connection Size, FNPT, 14°F to 130°F (MPN 01A31LM). Key specifications — Product Type: Fuel Meter; Rotor Material: Nylon; Accuracy %: +/-2.5%; Output Type: 4-20 mA; Brand: GPI; Unit Of Measure: Liters; Display Type: Digital; Termination: Not Listed.
GPI Turbine Meter: Flow Meter, Turbine, 1 in NPT, 1 in Connection Size, NPT, 0.3 gpm – 3 gpm, 1.5V (MPN A1Q9GMA025NA1). Key specifications — Product Type: Flow Meter; Rotor Material: Nylon; Accuracy %: +/- 5%; Brand: GPI; Unit Of Measure: Gallons; Display Type: LCD; Termination: Not Listed.
GPI
GPI Turbine Meter: Flow Meter, Turbine, 1 in NPT, 1 in Connection Size, NPT, 0.3 gpm – 3 gpm, 1.5V (MPN A1Q9GMA025NA1). Key specifications — Product Type: Flow Meter; Rotor Material: Nylon; Accuracy %: +/- 5%; Brand: GPI; Unit Of Measure: Gallons; Display Type: LCD; Termination: Not Listed.

More from GPI

View all GPI parts →