Fuel Consumption Meters

Fluidyne’s fuel consumption meters convert fuel usage from assumption to fact. delivering true volumetric measurement with repeatability better than 0.02%.

In engines and power systems, fuel return, pulsation, and load variation make conventional measurement unreliable. Fluidyne’s fuel consumption meters solve this using oscillating piston positive displacement technology,

Fluidyne offers two proven architectures: direct and differential methods of consumption measurement, the 6655 series differential fuel consumption meters and the 66X0 series direct fuel consumption meters. Both are designed for diesel engines, generators, marine engines, and heavy-duty industrial applications where fuel accountability, efficiency tracking, and performance optimization matter.

Core Information

Differential Fuel meter Concept

  • One oscillating piston flowmeter on fuel supply line
  • One oscillating piston flowmeter on fuel return line
  • Net fuel consumption calculated as: Supply minus Return totalizers
  • Additional deareator for Cummins PT engines

Why it works:
The 6655 series measures what enters and what returns, isolating actual fuel burned. This makes it fuel-agnostic and extremely accurate.

Direct Fuel meter Concept

  • Single oscillating piston flowmeter on supply line
  • Engine return fuel routed back into supply downstream of meter
  • Built-in return manifold

Why it works:
The return fuel never crosses the meter again, eliminating the need for differential calculation and simplifying installation.

  • Wide engine suitability – 7 kVA to 4000 kVA
  • Engine agnostic design. Suited for all brands
  • Single rotor oscillating piston positive displacement metering
  • No hunting or overspeeding due to low pressure drop
  • Complete CF3M 316L construction

  • Built in strainer

  • High repeatability – better than 0.02%
  • HART, FF, Modbus and other standard outputs
  • Long-term calibration stability
  • True volumetric fuel consumption meters
  • Rugged 316L CF3M construction
  • No straight runs of pipe needed
  • Independent of fuel density and temperature
  • Accurate under pulsating engine flow
  • Maintains accuracy at no-load conditions
  • Detects abnormal consumption trends

Applications

Data Centers

  • Diesel generators

Boiler Systems

  • Reciprocating fuel systems

Offshore Drilling Rigs

  • Diesel generators

Marine Industry

  • Propulsion engines

Engine Test Beds

  • Diesel

  • Blended fuel

Power Plants

  • Gas turbines
  • Auxillary engines

Related Product

Series 6655 – Differential Fuel Meters

Series 6623 – Differential Fuel Meter

Series 6600 – Fuel Consumption Meter

Series 6622 – Fuel Consumption Meter

FAQ’s

What is a Fuel Consumption Meter?

A Fuel Consumption Meter is an instrument used to measure the actual fuel consumed by an engine or system. Unlike level-based or inferred methods, fuel consumption meters directly measure volumetric fuel flow, providing accurate and repeatable data for efficiency analysis, cost control, and performance monitoring in diesel engines and power systems.

Fuel Consumption Meters work by measuring the volume of fuel delivered to an engine. Differential systems measure both supply and return fuel to calculate net consumption, while direct systems reroute return fuel downstream of the meter. Oscillating piston technology ensures true volumetric measurement, independent of fuel properties and flow variations.

Fuel Consumption Meters provide accurate fuel usage data, enable efficiency optimization, reduce fuel losses, and support predictive maintenance. They help identify abnormal consumption, improve engine performance analysis, and provide defensible fuel accountability in industrial, marine, and power generation applications.
Fuel consumption meters also can assist to detect fuel pilferages.

Yes. Fuel Consumption Meters can identify discrepancies between expected and actual fuel usage. Sudden deviations in consumption trends may indicate leakage, theft, or system faults. Continuous monitoring enables early detection, reducing fuel losses and improving operational transparency.

Maintenance requirements are minimal. Periodic inspection, filter cleanliness checks, and routine calibration verification are typically sufficient. Oscillating piston fuel consumption meters have a single moving element, resulting in low wear and long service life even under demanding engine operating conditions.