FAQ

Update 26/11/2016

Why we use Hall-effect sensors in our flow meters?

The Hall sensor is a magnetic field sensor. In contrast to the reed switch, it has a continuous signal response depending on the magnitude of the magnetic field. You can use continuity, for example, to determine the direction of motion of a passing magnet sensor. Thus, for the flowmeter, it is possible to create an algorithm for compensating for irregularities in the flow of fuel, which cause the measuring ring to move in the opposite direction. (In flow sensors built on reed switches, they are falsely counted as a normal flow). In practice, it is difficult to build such an algorithm, but our studies on the amplitude and frequency of flow pulsations in the fuel system of cars have made it possible to create a booth for imitating water hammers. Further studies showed that for reliable operation of the flowmeter on the Hall sensor, one sensor is not enough and it was decided to apply 3 Hall sensors. This complicated the algorithms, but allowed to get rid of a number of problems and make the system universal.
The Hall sensor, like a reed switch, registers the effect of an external magnetic field and flowmeters with such sensors can not make measurements when a strong magnet is brought to it. It’s in theory. In practice, the situation is the following: the reed switch can only show 2 states – there is an effect of a magnetic field or it is not and blocking its operation even by a relatively weak external magnet is not difficult. The signal from the Hall sensor carries information about the intensity of the magnetic field and the effect on it even of a strong rare-earth magnet only shifts the signal, which is easily compensated algorithmically and does not violate the performance of the flowmeter.
The complexity of the algorithms and the provision of the required speed caused the use of high-speed 32-bit microcontrollers with the ARM core operating at the frequency of 72 MHz in the Mechatronics flowmeter. The STM32 family of ST companies are not only high-performance, but also very reliable, noise-proof solutions, which further increased the reliability of the flowmeters.
The high stability of Hall sensors to the interference of the vehicle’s on-board network, and their high overload capacity, made it possible to create a line of cheap flowmeters on their basis without digital signal processing. Manufacture of flowmeters on reed switches without digital signal processing, due to the phenomenon of bounce of its contacts and weak protection from external magnetic influence, was discontinued.
In comparison with the reed switch, the Hall sensor has such a disadvantage as high power consumption, which makes it impossible for the flowmeter to operate from the built-in battery. Therefore, the rulers of the independent flowmeters Direct A and Delta A still use the detector on the reed switch.

Why I should choose Eurosens fuel meters?

Fuel flow meters have its field of application where can be called as best solution.
See this article.

On what to pay attention when choosing a fuel flow meter:

1. Correctly choose the type of flowmeter (single-chamber or differential). In order to reduce the cost, customers are often offered single-chamber flowmeters, the installation of which requires a change in the fuel supply scheme and a change in the operating conditions of the engine. Contact our technical support for assistance in choosing.
2. To work accurately on idling differential flowmeters should have fuel temperature sensors in each of the chambers. In the “supply” and “return” lines, a significant amount of fuel is constantly pumped. Since they have different temperatures, the created measurement error can substantially exceed the fuel consumption at idle.
All Eurosens Delta differential flowmeters have built-in thermal sensors in each of the measuring chambers.
3. Pay attention to the warranty conditions mentioned in the passport. Some manufacturers limit the normal warranty period by fuel amount passed through the flowmeter. In real operation, this period is over after 6-12 months.
Eurosens Direct and Delta flowmeters are accompanied by a 3 years’ warranty without fuel flow limitation.
4. Try to choose flowmeters with a Hall sensors instead of reed switches. Reed switch can be be brought into non-operational state by applying an external magnetic field. All Eurosens flowmeters (except for autonomous ones) – PH, PN, RS, CAN series use Hall sensors in the design.

I am GPS tracking provider. Why I should choose Eurosens Dominator?

Eurosens Dominator fuel level sensor will have the lowest cost during the lifecycle of GPS tracking system than any other sensor.
Especially if you take into account not only the cash costs, but also the working time of the personnel (diagnostics, repair, replacement, calibration of the tank, etc.). .

You can read about this more there:
I am owner of fleet. Why I should choose Eurosens Dominator?

Here we will repeat once again that we want to cut all possible cases of departure to check the sensor operation. It is very expensive job when sensor is installed 200+ kilometers away from your office. With Eurosens Dominator the most of problems can be diagnosed and solved remotely, thanks to modular design of sensors. This saves a lot of time and money (both yours and the customer).

While your rivals are going to offer cheapest possible GPS trackers and sensors with low reliability you can go to customer from the other side. And offer more prestigious and more economic product at the same time. It is easy to demonstrate to customer!

Difference in price between the cheapest fuel level sensor and Eurosens DOminator is less than cost on the one trip of your technicians to replace a burned sensor!

I am owner of fleet. Why I should choose Eurosens Dominator?

As a fleet owner you may be looking for a gps tracking system with fuel level monitoring option. You will need a special fuel level sensor installed in the tank. There are many manufactures presented at market. How to choose?
Most of sensors have similar precision (unlike cheapest China products). What makes the difference?
1. Stability in all operation conditions.
2. Protection of electronic module from electric disturbances at vehicle onboard circuit.
3. Sensor protection from vandalism.
4. Reliable sealing.
5. Easy diagnostic and repair
6. Warranty terms.

We suppose you buy GPS tracking system not for 1 year of operation. Rather 7 years and more. At long term the cost of system maintenance becomes more important than price of aquisition. We have made all possible things to minizime this total cost (aquisition + maintenance) during lifecycle.

How we did it?

1. It is very hard to burn Eurosens Dominator. It can be connected to 170V power source for a long time. Onboard disturbances is not a danger anymore.
2. Thanks to the modular design it is very easy to make diagnostics and replace sensor if needed. It is not necessary to call a GPS tracking supplier to replace sensor (expensive voyage, sometimes more than sensor cost). You can replace burned sensor by yourself. After sensor replace a new tank calibration is not required (several hours of the vehicle downtime).
3. Sometimes you will need to switch GPS tracking system to another vehicle. And fuel tank may have bigger height. With Eurosens Dominator you can buy only new electrodes (very cheap) and don’t need to buy a new sensor.
4. It is very easy to disassemble and clean Dominator electrodes. You don’t need to arrange this service (after several years this procedure may be needed).
5. Eurosens Dominator don’t have a cable outlets (weak place of sensors).
6. Eurosens Dominator warranty – 5 years.

So, you can save 30 USD and buy cheapest sensor. But difference with Eurosens Dominator not too big, it is more profitable to save much more money during lifecycle of GPS tracking system.

Training at the customer

Yes.

ALROSA, Russia, 2015

If the warranty on Eurosens flowmeters depends on the amount of the fuel passed through the sensor?

No.
The warranty period for fuel flowmeters Eurosens Direct and Eurosens Delta = 3 years

What standards the connector on the Eurosens sensors correspons to?

In the automotive industry it is common to locate the connector on the sensor body (temperature, pressure, position, air flow, fuel level, etc.). According to the recommendations of the truck manufacturers, Eurosens fuel level sensors and Eurosens flowmeters have a connector in accordance with DIN 72585 / ISO 15170.

The main recommendations on flowmeters’ installation

It is not difficult to install the flowmeter on the vehicle.
Eurosens Direct and Eurosens Delta flowmeters are highly precise devices for diesel fuel consumption measuring. Accuracy is provided due to high-quality mechanical processing of the internal rubbing surfaces, and also due to new mathematical algorithms for signal processing.
From experience!!!
Do not allow particles of dirt and dust to enter the flowmeters! The smallest fibers can lead to jamming of the flowmeter (fuel continues to flow, but the inner ring stops rotating). This can happen even during the first installation of the flowmeter on the engine. Therefore, the accuracy of the installation engineer’s work and the cleanliness of the fuel lines connected to the flowmeter are very important.
Old filters for coarse and fine fuel cleaning are potential sources of dirt. Check their condition before installing the flowmeters and change as necessary. This will not only help the flowmeter working, but also prevent the failure of the fuel equipment of your vehicle.

What information is shown on Eurosens Display

Eurosens Display F1 is a universal indicator for displaying information about the level of fuel or the amount of fuel consumed. It depends on the external sensor that is connected to it. Information to be shown on Eurosens Display F1 is adjusted by the special software. The indicator can be connected to the sensors of various manufacturers. This is a unique opportunity.

Why Eurosens Delta measures more precisely…

Usually fuel that comes to the engine is colder, than fuel that is drained into the tank after a high-pressure fuel pump. Diesel fuel is extended depending on temperature. It brings an additional error at calculation of a difference flow.
In differential fuel flowmeters Eurosens Delta we installed a separate temperature sensor in each measuring chamber. The control microcontroller of the flowmeter, based on the readings of these sensors, corrects the volume of fuel flowing through each chamber.
Important!! Among the differential fuel flowmeters such a function available only in our Eurosens Deltaflowmeters!
It removes the additional error of flow measurement associated with the difference in fuel temperatures.
It significantly expands the scope of application of Eurosens Delta for vehicles with Common Rail systems and for vehicles complying with Euro 4, Euro 5 and Euro 6 standards.

Information on the built-in display of Eurosens Dominator RS-I…

1. After sensor calibration, the liquid level in % (percents) of the tank height (tank) is shown on its display.
2. In litres – after tank calibration.

Why Eurosens Dominator is user-friendly …

Fuel level sensors Eurosens Dominator are easy in installation, diagnostics and maintenance and it is very hard to burn them. So, business of our customer is simplified with Eurosens Dominator and its modular design.

Each of Eurosens Dominator models (AF and RS) has several customizable interfaces. So, you can use Eurosens Dominator with almost any GPS tracker. Modular design allows you to build sensor set for any object from components at your stocks. it is more flexible approach that ordering of sensors with pre-set length of electrodes.

Unlike other fuel level sensors Eurosens Dominator is attached to fuel tank not directly but via special mount plate, called bayonet. Bayonet mount allows you to de-install the sensor easily for cleaning the electrodes or performing simple diagnostics. This does not require the departure of specialists.
Eurosens Dominator can’t be burned after voltage disturbances in the vehicle onboard circiuts. Eurosens Dominator can be connected directly to power source with voltage level up to 170 Volts.

Eurosens Dominator for water measuring …

Yes. We can make the modification level sensors Eurosens Dominator, which will control the water level in the tank. They are not commercially available. We have developed the design of such sensors and adapted their internal software. Sensors are available for pre-orders.

Is there two digital interfaces in Eurosens Dominator RS …

Is it true that the two digital interfaces in the Eurosens Dominator RS sensors are outputted to separate contacts of the output connector? Yes. Dominator RS sensors have both RS232 and RS485 digital interfaces. You can choose the interface in the configuration software.

Can I use the cables…

Can I use the cables from the Eurosens level sensors for Eurosens flow sensors? – Yes. They are compatible.

If the protocol of digital level sensors is compatible

Yes. The output protocol of digital (RS-232, RS-485) level sensors Eurosens Dominator RS is compatible with protocols of other fuel level sensors’ manufacturers.

Can I buy parts of the level sensors separately?

Yes. The Eurosens Dominatorr sensors are designed in such a way that there can be flexibly supplied both electrodes and the calculating part of the sensors (sensors’ head) to customers. Mounting kits are also supplied separately.

If Eurosens Dominator AF can replace…

Eurosens Dominator AF 200x169

Yes. Eurosens Dominator AF replaces the 3 types of level sensors – the one with analog output to 5 V, also with analog output to 10 V and with a frequency output of up to 1500 Hz.