Fuel Flow Meter

Fuel Flow Meter – Accurate Monitoring for Fuel Consumption & Operating Time

Metromatics proudly offers the DFM Fuel Flow Meter.  Designed for real-time measurement of fuel consumption, engine operating time, and fuel usage efficiency across a wide range of mobile and stationary machinery.

Ideal for fleet monitoring, generator sets, construction equipment, agricultural machinery, and more.  In addition, these meters help reduce operational costs, improve fuel efficiency, and prevent unauthorised fuel use.

Suitable for a wide range of Fuels

Firstly, the DFM Fuel Flow Meter is compatible with a wide range of fuels, including diesel, petrol, and biodiesel. It also operates effectively with other liquid fuels and mineral oils with a kinematic viscosity between 1.5 to 6 mm²/s.

This model features a single fuel measurement chamber, making it ideal for small to medium engines with indirect injection fuel systems.

For larger diesel engines with recirculated fuel lines, consider the DFM D Differential Fuel Flow Meter, which features a dual-chamber design for precise measurement of supply and return fuel.

For high-flow applications—such as boats, mining equipment, or machinery requiring up to 4,000 L/h flow rates—explore the DFM Marine Model.  Or wireless version S7  Fuel and Oil flow meter.

🔧 DFM Fuel Flow Meter Key Features

• Real-Time Fuel Monitoring
  Measures actual fuel consumption in forward and return lines and calculates the differential to determine net fuel usage.

• Built-in Operating Time Counters
  Tracks total engine run time and operating time in key load modes:

  • Idling

  • Optimal

  • Overload

  • Reverse flow (negative consumption)

• Multiple Counter Readouts

  • Instant fuel consumption (L/h)

  • Hourly, total, and trip fuel consumption

  • Consumption segmented by operational mode

  • Total engine runtime

  • Consumption during overload or excessive use

• Tamper & Interference Protection

  • Tampering Counter – Detects attempts to falsify data (e.g., artificial flow through air pressure).

  • Interference Counter – Monitors magnetic field interference aimed at manipulating the meter.

• Standalone or Integrated Operation

  • Models available with LCD displays for local readout.

  • Output cable options for integration via RS-232, RS-485, or CAN J1939/S6 protocols.

  • Combo units include both display and data output capabilities.

• Power-Independent Data Logging

  • Features an internal battery that logs data even if external power is interrupted.

  • Once power is restored, all recorded data is transmitted to the telematics unit automatically.

• High Flow Rate Accuracy

  • Measures flow rates up to 500 litres per hour with a precision of ±1%.

  • Higher capacity versions (e.g. DFM Marine) available up to 4,000 L/h.

• Compact and User-Friendly Design

  • Rugged housing and an easy-to-read LCD screen (on applicable models).

  • Built-in alarm functions alert you to irregularities in fuel consumption patterns.

DFM Types

A solution for the following tasks

• Fuel consumption control
• Fuel consumption rationing
• Fuel consumption optimisation and real time monitoring
• Monitoring fuel flow
• Engine fuel consumption testing

💼 Applications

• Fuel consumption control

• Fuel consumption rationing

• Fuel usage optimisation and real-time monitoring

• Engine testing and diagnostics

• Fleet and equipment management

• Theft detection

🔍 Additional Advanced Features

• IoT Burger Technology
  Secure digital data storage in internal counters enables reliable, tamper-resistant tracking.

• Optional Bluetooth Connectivity
  When used with the S6 BT Adapter, the meter can transmit data wirelessly to mobile apps and tracking systems.

• Rugged Signal Cable
  Designed to withstand physical wear, vibration, and temperature fluctuations.

• Integrated Mud Filter
  Protects both the engine and sensor from contaminants like water or debris in fuel lines.

• Dual-Chamber Option
  Enables precise measurement of both supply and return flow, making it ideal for engines with fuel recirculation systems.

Fuel Consumption and Operating Time Counters

Fuel Consumption

• Instant Fuel Consumption
• Hourly Fuel Consumption in “Forward” Line
• Hourly Fuel Consumption in “Return” Line
• Fuel Consumption in Litres, Idling, Optimal, Overload & Negative

Engine operating time

• Total operating time, hours, idling, optimal, overload, negative
• Supply chamber operating time
• Return chamber total operating time
• Operating time of Supply and Return chambers in each mode of engine operation

Special

• 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
• Battery charge

🖥️ Information Displayed on the DFM Fuel Flow Meter Screen

DFM models equipped with an LCD display provide real-time fuel consumption monitoring without the need for data transfer to a server—making them ideal for standalone use in stationary units or small fleets operating within a local area.

The display shows:

• Total Fuel Consumption

• Engine Operating Time – segmented by Idling, Optimal, and Overload modes

• Instantaneous Fuel Consumption (L/h)

• Fuel Consumption in Tampering Mode

• Interference Duration

• Battery Charge Level (%)

• Temperature in the Measuring Chamber

• Firmware Version

This makes the DFM a highly transparent and user-friendly tool, even in offline or low-infrastructure environments.

🔒 Built for Security & Reliability

The DFM Fuel Flow Meter is engineered not only for accuracy, but also for durability, security, and long-term reliability in demanding environments.

• Rugged Metal Housing
  A tough, sealed metal body protects the internal components from dust, dirt, and mechanical damage, while also preventing vandalism or unauthorised tampering.

• Direct Fuel Line Integration
  Installed directly into the fuel line, the DFM enables immediate detection of irregular fuel flow, helping identify theft, leaks, or siphoning attempts.

• Advanced Tampering and Interference Detection

  • The Tampering Counter logs attempts to falsify consumption readings (e.g., blowing air through the meter).

  • The Interference Counter detects magnetic field influence and records the duration of attempted disruptions—sending alerts to the telematics unit.

• Sealed Fuel System Components
  DFM units are supplied with tamper-evident seals on the body and fuel line fittings. Any attempt to interfere with the installation will break the seal, providing visible proof of tampering.

• Extended Battery Life
  An internal battery allows the meter to operate autonomously for up to 3 years. Even when disconnected from the vehicle’s power system, the DFM continues to log and store data in its non-volatile memory. Once power is restored, stored data is automatically transmitted to the telematics system.

For model information and pricing, contact us.

Specifications of Fuel Flow Meter

Models