Беспроводной расходомер топлива

Wireless fuel flow meter

Wireless fuel flow meter

DFM S7 and DFM D S7 – hardware tool for direct fuel consumption measurement and monitoring flow of liquids with 1.5 to 6 mm2/s kinematic viscosity, also used for recording engine operation time and fuel/liquid flow time. DFM S7 wireless fuel flow meters are used in vehicle telematics (GPS/ GLONASS vehicle tracking), online monitoring systems of stationary engines, boilers/heaters, and as an stand-alone solution for fuel consumption monitoring.

The flow meters are based on S7 Technology, which ensures wireless data transfer via Bluetooth 4.X (Bluetooth Low Energy) to several devices using BLE-radio. In other words, the flow meters are operated in “advertising” mode – data is sent simultaneously to telematics units and GPS trackers, Bluetooth-displays, smartphones and tablets.

Core features

  • operation in BLE-radio mode: data is sent to several Receivers at the same time
  • in-built battery – fuel flow sensor works without external power supply
  • very low power consumption allows autonomous operation of flowmeter for 5 years
  • explosion and fire safety without additional intrinsic safety barrier
  • no cables – improved resistance to vandalism or accidental damage
Fuel consumption measurement


Preventing fuel theft
Engine testing for fuel consumption
Machine running time trackingMachine running time tracking

Models of wireless fuel flow meters

Single-chamber (models DFM 50S7, DFM 100S7, DFM 250S7, DFM 500S7) – fuel consumption measurement in fuel feed line of engine. Can work both autonomously and as part of a telematics system. Designed for fuel consumption control of road, off-road and railway vehicles, water vessels, diesel generators and stationary machinery equipped with Euro-4 engines and lower, which have 1 to 500 L/ h flow rate.

Single-chamber flow meter with Blueooth

Differential (models DFM 100DS7, DFM 250DS7, DFM 500DS7) – measure fuel consumption as the difference in flow rates in feed and return lines of fuel system – differential consumption measurement from 10 to 600 L/ h. Designed for fuel consumption control of road, off-road and railway vehicles, water vessels and stationary machinery equipped with modern diesel engines, which has Common Rail or pump injector fuel systems.

Differential flow meter with Bluetooth

Fuel consumption and operating time Counters:

  • Hourly fuel consumption, L/H
  • Total fuel consumption, L
  • 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
  • Fuel consumption in “Tampering” mode
  • Current engine operation mode as per fuel consumption rate
  • Fuel temperature
  • Battery charge
  • 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
  • Operating time in “Tampering” mode
  • Operating time in “Interference” mode, h

Bluetooth data transfer to telematics unit or tracker

The flow meter continuously transfers information about fuel consumption, engine operating time, engine operation modes, recorded Events using “advertising” (BLE-radio) mode. Data is received using S7 Technology by all devices within the range of the signal of BLE module of the fuel flow meter.

Wireless BLE sensors in vehicle telematics

GPS trackers compatible with DFM S7 wireless flow meter

GPS trackers compatible with DFM S7 wireless flow meter

Fuel consumption control via Bluetooth on a smartphone

To receive data from wireless fuel counter using S7 Technology to a smartphone/tablet based on OS Android 5.X and above, Fuel consumption monitor mobile application is used, the functionality of which allows a user to:

  • carry out fuel consumption and temperature monitoring
  • perform fuel consumption accounting
  • record machinery operating time
  • monitor engine operating mode based on flow rate
  • view real time graph of instant fuel consumption
  • monitor flowmeter malfunctions
  • check fuel sensor’s battery charge
  • monitor hourly consumption and fuel temperature values
  • perform operations with flow meter’s configuration profile

Fuel consumption monitor app is available in Google Play (search request “Technoton”)

Wireless fuel monitoring over smartphone

DFM S7  part number description for ordering

Wireless fuel flow meter models

The designation U is relevant only for single-chamber models.

Models are delivered by special order.

Technical specifications of wireless flow meters

Max pressure, bar 25
Interface Bluetooth 4.X
Tx power, dBm +4
Maximum distance between  fuel flowmeter and receiving device, m 15 m (if there are metal bulkheads at the installation site) 50 m (when installed in line-of-sight)
Battery life, years not less than 5
Operating temperature ºС -40…+85
Ingress protection rating (IP Сode) IP54

Other products for fuel monitoring and fuel oil measurement

Single-chamber flow meter

flow rate 1-500 l/h

Single-chamber flow meter

Differential flow meter

flow rate 10-600 l/h

Differential flow meter

Industrial flow meter

flow rate 0,72-25 m3/h

Industrial flow meter

Flow meter for heavy machinery

flow rate 20-4,000 l/h

Flow meter for heavy machinery

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