Differential fuel flow meter DFМ. Fuel consumption measurement on EURO 3/4/5 diesel engines.

Differential fuel flow meter DFМ is designed for diesel fuel consumption measurement..Read more

Fuel flow meters DFМ. Fuel gauge for actual fuel consumption measuring.

Fuel flow meter DFМ is designed for diesel fuel consumptionmeasuring in the fuel line..Read more

Contactless reader Crocodile. Safe receiving of vehicle operation data

Contactless data reader Crocodile allows to read the data about vehicle operation..Read more


Fuel flow meters DFМ. Fuel gauge for actual fuel consumption measuring.

Fuel flow meter DFМ is designed for diesel fuel consumptionmeasuring in the fuel line of the following vehicles:

  • trucks;
  • tractive vehicles;
  • tractors of various types;
  • loaders;
  • graders;
  • road-building machinery;
  • boilers;
  • boats;
  • burners;
  • technological transport;
  • fixed installations with diesel engines etc.
Fuel flow meter 90AP
Inline fuel meter DFМ can be applied for fuel accounting both autonomously and as a part of vehicle tracking and fuel monitoring system.Fuel gauge DFM allows to solve the following tasks:

  • fuel consumption control;
  • fuel consumption rationing;
  • fuel theft detecting and preventing;
  • fuel comsumption optimization and real-time monitoring;
  • engine fuel consumption testing.
Fuel counter 100C
Fuel meter DFМ enables to receive objective information about actual fuel consumption and vehicle working time. It also permits to reduce fuel and repairing costs. It is possible to develop fuel consumption rates for selected routes and technological operations.

The economic effect of using the fuel accounting devices is different at various companies, usually about 10 to 40%, depending on the baseline situation and management persistence.

Differential fuel flow meter

DFM installation video

Recommended tracking devices for fleet monitoring

Find the information about the compatibility of DFM and different tracking devices here. To receive more information about compatibility of other tracking devices that were not included into this table, please contact us at

DFM compatibility with tracking devices

Ordering information

The range of DFМ devices includes the following models:

DFM order information

DFM models choice for internal combustion engine/boiler
Engine power,
Boiler heat
productivity, kW
inline fuel meters
mounting kits
under 80 under 400 DFM 50 MK20
80-150 400-800 DFM 90,
DFM 100
MK20, MK40
150-300 800-1500 DFM 220,
DFM 250
300-600 1500-3500 DFM 500 MK45

Operating principle

Fuel gauge DFM has three-dimension ring type measuring chamber. DFМ generates an impulse, when the volume of fuel (which is equal to volume of the measuring chamber) passes through it.For detailed operating principle for every DFM model please visit product pages.

Measured fluids

Fuel flow meter DFМ can be used for consumption measuring of the following fluids:

  • diesel fuel;
  • heating oil;
  • engine oil;
  • other types of liquids with kinematic viscosity from 1.5 to 6 mm2/sec*.

* Application for more viscous liquids is also possible, but the maximum consumption may get less than critical and the pressure on the meter gets down. All the meters DFM are tested with diesel fuel. Please specify the fuel type and viscosity in your order.

The materials resistant to gasoline are used for DFМ manufacturing. Use safety means in accordance with the national laws when working with gasoline.


  • protection against unauthorized interference and tampering with the meter;
  • resistant to vibration and hydraulic impacts;
  • big in-built mud filter;
  • meets road standards of electromagnetic compatibility, mechanical and climatic influences;
  • durable and precise measurement zinc-aluminum chamber;
  • full set of mounting accessories;
  • all the fuel flow meters DFM are tested on the metrologically certified installation when produced.


Connecting thread M14x1.5
Nominal pressure, MPa 0.2
MAX pressure, MPa 2.5
Supply voltage, V 10-50
Overvoltage protection, V ≤100
Current consumption, mA ≤25 (24 V)
≤50 (12 V)
Operating temperature, °C without display: from -40 to +80;
with display: from -20 to +60


Fuel meters DFМ are mounted into fuel line of vehicles according to approved installation schemes. Fuel pipe and mounting kit can be additionally included in delivery package.

We strongly recommend to seal pipe connections after the fuel flow meter output.

To get detailed information about DFМ installation please contact Technical Support.

DFM fuel flow meter installation befor the pump
DFM fuel flow meter installation after the pump

Measurement scope and accuracy

Model The nominal bore Start-up consumption,
MIN flow rate,
MAX flow rate,
DFМ 50 AK, B, C, CK 6 0.5 1 50 1
DFМ 90 AP 6 0.5 3 90 2
DFМ 100 AK, B, C, CK 6 0.5 2 100 1
DFМ 220 AP 8 2 8 220 2
DFМ 250 AK, C, CK 8 2 5 250 1
DFМ 500 AK, C, CK 12 5 10 500 1


Warranty period for DFM logofuel flow meters is 3 years from the date of manufacturing; the measuring chamber resource must not be exceeded.

Useful links

See also Fuel counters DFМ i5 / i12.5.