Fuel monitoring and GPS tracking of
construction machines with the help of a 2-in-1 device

Customer: QBS International, construction company (Qatar)
Task: fuel tank monitoring, GPS vehicle tracking
Machinery: fuel tanker trucks, stationary fuel tanks
Solution: DUT-E GSM fuel level sensor with built in GPS and GSM modules
  • precise fuel costs accounting,
  • optimization of fuel delivery schedule for construction sites,
  • 45% decrease of costs associated with fuel distribution and consumption.

 The Customer

QBS lnternational WLL was established in Qatar in 2007. The company is а member of QBS lnternational Group operating in the USA, African and Middle East regions.

Specialists from 17 countries of Europe and Asia work in QBS lnternational: C-levels, project managers, engineers, builders, drivers, plant operators, tractor operators, support personnel. The company has built several modern enterprises for building materials production (asphalt and concrete plants, crushing and sorting lines for crushed stone production).

QBS lnternational portfolio includes several dozens of major projects implemented in Qatar: highways, airfields, roads in cities.

1700+ employees

5 building materials manufacturing factories

280+ machinery units

10+ years of success

The Machinery

The company owns road construction machines, dump trucks, special machinery, buses, cars.

Almost all machinery is equipped with diesel engines. Often, work is carried out in remote locations where no gas stations are located. To ensure uninterrupted supply of diesel fuel, stationary fuel storages (fuel tanks) and fuel tanker trucks (vehicles carrying fuel) are used.

Stationary fuel tanks have a volume of up to 50,000 liters. Fuel tanker produced by Gorica (UAE) on Toyota Dyna chassis. The truck is equipped with a diesel engine (4 cylinders, volume 2.5 liters, power 75 kW). The volume of single-compartment fuel tanker truck is 3000 liters.

Fuel level sensors installed in stationary fuel storages, fuel tankers

Determine location and route of fuel tankers

Monitoring fuel level in stationary fuel storages

The Task

Some difficulties, which cannot be solved with the help of standard on-board equipment, arise in operation of fuel storages and fuel tankers.

The peculiarity of Middle East climate is strong temperature fluctuations of fuel. During the day, air temperature can “jump” to 40 degrees, what leads to a significant expansion of the fuel. When refueling tanks and giving out fuel, the level is measured by a standard floating sensor or a dip stick (a pole which is immersed in stationary fuel tank). Temperature expansion of fuel is considered by means of correction tables.

This method is labor intensive, since the numbers are manually typed on calculator and written down in spreadsheets – that gives a big inaccuracy error. At stationary storages, which are 3 meters high, the measurement error is almost 1000 liters. This inaccuracy is exploited by unfair employees who are taking fuel for their own needs or for sale, usually it happens when fuel is given out.

Another important task is to determine location and route of fuel tankers.

Real time monitoring of these data allows optimizing delivery schedule of fuel to construction sites and reduce direct costs for transportation of fuel, as well as indirect costs – salary of drivers can be related to the amount and quality of work done.

The Solution

For accurate monitoring of fuel volume in stationary storages and fuel tanker trucks, as well as for tracking the route and location of fuel tankers over GPS/GLONASS, DUT-E GSM fuel level sensors were installed.

DUT-E GSM – is a two-in-one device: fuel level sensor and vehicle telematics unit (GPS + GSM features) in one body. DUT-E GSM has significant advantages over standard combination “sensor + tracker”: DUT-E GSM is installed, connected and configured quicker because twice less operations should be performed.

DUT-E GSM measures fuel level and volume in a tank with high accuracy. Measurement inaccuracy is less than 1%. The sensor measures ambient temperature and makes an automatic data correction to provide customer with clear and solid information on fuel volume.

For stationary storages DUT-E GSM with long measuring probe is needed. To reduce costs of delivery to customer’s location, 1-meter long sensor together with additional sections is shipped. The sensor is easily assembled by technical specialist at the place of sensor installation.

DUT-E GSM sends real-time on-board Reports to ORF4 telematics service. Onboard Reports contain:

  • fuel level (mm) and fuel volume (l) in the tank;
  • notifications on Events: “refueling “, “giving out fuel” and “fuel drain”, indicating the time and place of the Event;
  •  route, location and speed of fuel tanker.

Monitoring of fuel volume in stationary storages and fuel tanks

Technoton’s partner

For several years our company has been a partner of Technoton. We decided to install DUT-E GSM sensors on QBS International's machinery. This decision was influenced by three reasons.

First, the "two-in-one" design is very convenient. Functionality is the same as for "FLS + tracker" combination, but installation takes twice less time.

Second, the sensor itself is not long and it is delivered with additional sections. The sensor can be easily transported, and quickly assembled on site to fit a high fuel tank. Third, unique mechanism of thermal compensation ensures stable operation of electronics even under scorching summer sun. This is extremely important for our region.

The Result

At the beginning of the project, DUT-E GSM fuel level sensors were installed in six tanks and cisterns. QBS International’s dispatch service monitors real fuel volume at any moment of time – this allowed to optimize fuel tankers’ routes of movement and precisely plan schedule for fuel delivery.

The effect of introducing a telematics system

Thanks to precise monitoring of refueling and fuel draining volumes, the number of unauthorized fuel drains from stationary storages was minimized.

In addition, by abandoning procedure of manual fuel level measurement and data entry, it became possible to exclude errors in calculations and save many working hours of company’s employees. That resulted in a 45% reduction of costs associated with fuel distribution and consumption.


"For a long time, we have been looking for a solution, which can automate fuel monitoring in large stationary storages. Fuel storages are 3 meters high. No manufacturer, except Technoton, was able to provide us with sensors for accurate measurement of level and volume of fuel in tanks of this height.

Labor-intensive procedure of manual fuel level measurement is a thing of the past. Now we monitor fuel level online and can precisely plan the supply of fuel to our construction sites.

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