Fuel flow meter DFM Marine

Fuel flow meter for marine

Fuel flow meter DFM Marine

DFM Marine is used in telematics systems (GPS tracking systems) and as an autonomous fuel monitoring solution. DFM Marine is installed in fuel line of the engine / boiler / burner, directly measures fuel consumption and generates an output signal, which is sent to telematics unit (GPS tracker).

DFM Marine is used for monitoring fuel consumption and operating time of engine (fuel consumer), and suitable for :

    • water transport – sea and river vessels;
    • locomotives and railway machines;
    • quarrying and mining machinery;
    • powerful diesel generators, boilers, burners.


  1. Fuel consumption optimization.
  2. Fuel misuse and theft detection.
  3. Fuel consumption monitoring.
  4. Engine testing for fuel consumption.
  5. Machine hours monitoring.

Advantages of DFM Marine

Advantages of DFM Marine

Measuring chamber made of brass

Measuring chamber is made of corrosion-proof and highly durable material – brass.

Different material and fuel line connection type designs

Body and fuel line connections of DFM Marine can be made of duralumin (lighweight and inexpensive) or brass (corrosion-proof and more durable). Fuel line connection types – thread or flange – specified in purchase order.

Operation in differential fuel consumption measurement mode

Any two units of DFM Marine are configured from PC to operate in paired mode, without a need of selecting and calibrating two compatible pieces. Differential fuel consumption measurement mode is used for measuring consumption of fuel in supply and return fuel lines of an engine, if necessary.

Fuel consumption and operating time Counters

Fuel consumption

  • Instant fuel consumption, m3/h.
  • Total fuel consumption, m3
  • Total fuel consumption in “Idling” mode of engine operation.
  • Total fuel consumption in “Optimal” mode of engine operation.
  • Total fuel consumption in “Overload” mode of engine operation.
  • Resettable fuel consumption counter.

Engine operating time

  • Total operating time, h.
  • Total operating time in “Idling” engine operation mode.
  • Total operating time in “Optimal” engine operation mode.
  • Total operating time in “Overload” engine operation mode.
  • Resettable operating time Counter.


  • Engine operating time in “Tampering” mode, h.
  • Engine operating time in “Interference” mode, h.
  • Current engine operation mode as per fuel consumption rate.
  • Fuel temperature.
  • Temperature correction status.
  • Correction coefficient value.
  • Event alarms: “Power on/off”, “Tampering”, “Interference, etc.
  • Battery charge.

DFM Marine models

The DFM Marine product line includes the following models :

DFM Marine models

*Interfaces: RS-232 (protocol DFM COM (LLS) and RS-485 (protocol Modbus) on request

With display only (autonomous fuel flow meter)
Output signal cable + display

DFM Marine installation

DFM Marine fuel flow meter is installed in fuel line after fine filter :

  • per “pressure side” scheme, after low-pressure pump.
  • per “suction side” scheme, before low-pressure pump.

For more information about the installation process, including installation schemes description, refer to DFM Marine Operational Manual in Document Center.

You can also order training on installation and configuration of DFM Marine.

Diagnostics and configuration of DFM Marine

Diagnostics and configuration of DFM Marine

FM DMarine diagnostics function allows to evaluate performance of the flowmeter and applicability of DFM Marine settings to fuel system operation parameters. In “Diagnostics” menu, a chart of instant fuel consumption is available, as well as fuel temperature in the chamber, self-diagnostics codes of flow meter, Journal of logged Events – “Power on/off”, switching to “Tampering” and “Interference” oepration modes.

DFM Marine is configured with Service S6 DFM software available for PC. It is possible to adjust the following settings of DFM Marine :

  • Boundaries of operation modes – “Idling”, “Optimal”, “Overload”, “Tampering”, “Interference;
  • correction and temperature correction coefficient.
  • units of measurement (Metric/US).

Specification :

Maximum pressure :

  • flange connection : 25 atm.
  • thread connection : 16 atm.
  • Maximum temperature of working fluid : 150°С.
  • Fluid viscosity : 1,5 – 6,0 mm2/s (cSt).
  • Measurement chamber material : brass.
  • Body/connection materials : brass/duralumin*
  • Inaccuracy rate : see tab “Measurement range and accuracy”.
  • Communications standard : CAN J1939/S6 + NMEA2000 digital interface RS232/485 (protocols: Modbus and DFM COM (extended LLS)) interfaces pulse output.

Measurement range and accuracy :

Measurement range and accuracy of DFM Marine flow meters :

Model (by size) Starting flow rate*, m³/h Minimum flow rate (Qmin), m³/h Maximum flow rate (Qmax), m³/h Relative accuracy error, %, not more than***
DFM Marine 1000 0,01 0,02 1 ±0,5**
DFM Marine 2000 0,02 0,04 2
DFM Marine 4000 0,04 0,08 4

* Minimum threshold flow rate value when the meter starts operating.
The value is indicated for reference only as accuracy is not standardized for operation
on the starting flow rate.

** In differential/summarization measurement mode, inaccuracy is not higher than ±1.0 %
(depending on the proportion of fuel consumption in chamber of each flow meter used).

***If fuel consumption in the range from Qmin to 3∙Qmin, the allowed inaccuracy is not more than ±1.0 %,
for differential/summarization fuel consumption modes – not more than ±2.0 %.

Power supply :

DFM Marine power supply modes:

  • Stand-alone power supply (DFM Marine C models) DFM Marine is powered from the built-in lithium-silicon battery. Estimated DFM Marine operation time until full battery discharge is not less than 36 months.

  • Combined power supply (DFM Marine CK/CCAN models) — DFM Marine is powered from the external power source or built-in battery (in case external power is off). Power supply is switched to stand-alone mode in case of low level of external power supply (less than 8 V). Estimated DFM Marine operation time in this mode is not less than 36 months.

Read more : HM HIGH PRESSURE TURBINE FLOW METERTRG STANDARD TURBINE FLOW METERPOSITIVE DISPLACEMENT FLOW METERS; Positive Displacement Flow Meters for Oil GasGear Flow Meters for abrasive, corrosive and less lubricating fluids; Turbine Flow Meters with Flange Connections (HM F); Fuel level sensor for marine



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