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GreCon UPU 6000

Inline early blow detection with ultrasonic technology

The ultrasonic measuring system GreCon UPU 6000 detects inhomogeneities in panel-shaped materials, such as wood based panels, inline. Size and location of defective areas are recorded and visualised. Thus, defective panels can be identified and sorted out in time.
The measuring method supplies reliable results for both thick panels of up to 55 mm thickness and light panels of a density of < 550 kg/m³.
Depending on the required quality, different defect types, such as blows, that allow a graded quality sorting can be configured.

GreCon UPU 6000 fs

Kai Greten explains the benefits of the GreCon UPU 6000 fs system



Benefits at a glance

  • Early detection and localisation of hidden defects
  • Prevention of blows by early recognition in the DC trend
  • Realisation of reserve capacities thanks to process trending
  • Higher output by increase in production speed
  • High availability and operational reliability of the system
  • High reliability of measured values because disturbing environmental influences are eliminated by automatic adjustment and an integrated dust accumulation control of the inspection channels

Measuring method

Ceramic transmitters are installed below the material flow. The ultrasonic signal generated by the transmitters penetrates the material and is received and evaluated by the receivers that are installed above the material flow. An attenuation of the received ultrasonic energy is registered as a deviation from the nominal value and indicates a possible weak point.
In order to protect the sound quality against disturbing influences, such as reflections, the wanted signal is protected by protection curtains.

In order to obtain good measuring results, the measuring conditions should be the same for all channels. The operator can check the function of the inspection channels and re-adjust, if necessary, by an electronic adjustment that can be conducted in panel gaps during the production


Principally, all GreCon measuring systems base on the operating system Windows. The easy menu structure, which is almost the same for all measuring systems, makes an intuitive and user-friendly application possible. All relevant data of the products to be measured can be stored in the recipe administration. The measured data can be exported and processed in a customised way by a highly efficient reporting.
Find out more about our software.


  • The measuring data is issued graphically and numerically:

    • Alert if the tolerances are not observed 
    • Display of the position in which the tolerances are not observed 
    • Freely configurable display of numerical parameters as information on the production type or statistics.

    Graphically and numerically:

    • Alert in case of blows 1, 2
    • Display of the position and the extension of defects in 250 gradations (colours) with reference to the place on the panel.

    Tachometer function:

    • Clear tendency display as tachometer.
    • The operator becomes aware of the current actual situation at a glance.
    • Optional display of the average value, the minimum value or the maximum value.

    Long-term graphic:

    • The DC trending informs on the homogeneity of the panel and the production process (only in case of the process optimisation option).
    • The average value trending shows variations by different process influences.
    • The minimum trending informs on the probability of blows.

    Numerical values:

    • Freely configurable display of numerical parameters as for example information on the production type or statistics.
  • Oscillating operation
    Use in case of sanding lines. With this function, the monitoring channels are controlled automatically so that those channels are active between which the panel moves.  Including two additional light scanners to determine the panel position.

    Pack measurement
    Several panels are measured in a pack. The recorded measured pack values are evaluated per panel. 

    Automatic recipe optimisation 
    The recipe parameters are determined automatically by the system control with the automatic recipe setting. It is possible to set the necessary parameters without any previous knowledge.

UPU 6000 fs

for full-scan measuring

Full-scan delamination detection
The UPU 6000 fs offers further benefits, such as

  • Detection of blows up to the panel edge
  • Complete inspection of the material
  • Up to 16,384 colours

UPU 6000

for small installation depth

UPU 6000 ct

for easy maintenance

In the so-called ct-design, the frame construction is divided in the centre. The right and left measuring frames can be separately triggered and moved pneumatically. Thus, maintenance work can be conducted without production interruption. Even escape runs are possible, if required, to protect the channels against damage.

Construction of the system

The inspection channels required for measurement are mounted on a steel frame. The design of the system is individually adapted to the material to be measured and the local conditions. The frame can be equipped with a maximum of 128 inspection channels.

The closed frame concept protects all components, such as cable and air channels, transmitter electronics or compressed air lines, against surrounding environment. A hinged mechanism protects the channels against damage from big blisters.

Process Optimization

With this option, additional parameters, by means of which the operator can counteract the production of blisters and thus reduce the reject rate, are visualised. Instead of 5 colours that are standard, 250 colours are available for the representation of inhomogeneities of the measured panels.

For the improved resolution of measured values, a homogeneous calibration sample is automatically and mechanically placed between transmitter and receiver to be able to conduct the precise adjustment that is required for the resolution of 250 colours.

Furthermore, the system is equipped with an automatic dust accumulation control that is activated at predetermined intervals in the gap between two panels and does not disturb the measuring process. If the values of an inspection channel strongly deviate from the reference value, a warning signal is sent to the operator. If the degree of dust accumulation exceeds the limiting value, the next maintenance interval is indicated to the operator.

Extended working range
An extended range of transmitter and receiver components allows the measurement of special products, such as wood based panels of a thickness of up to 55 mm and a density of 550 kg/m³.

Diffrent types for every situation

  • Full-scan delamination detection
    The UPU 6000 fs offers further benefits, such as
    - Detection of blows up to the panel edge
    - Complete inspection of the material
    - Up to 16,384 colours

  • In the so-called ct-design, the frame construction is divided in the centre. The right and left measuring frames can be separately triggered and moved pneumatically. Thus, maintenance work can be conducted without production interruption. Even escape runs are possible, if required, to protect the channels against damage



The measured panels are graphically represented in 5 or 250 colours, depending on the configuration of the system. The colour balance provides information on the quality and homogeneity of the panels after pressing.

Quality indicator

A clear indication of the current panel quality is the quality indicator. All measured values of a panel are compressed and represented as a quality key on a scale, similar to a speedometer.

Long-term graphic

To represent the trend of the panel quality, the maximum value, the average value and the minimum value of a panel are shown in a long-term graphic. Influences on the production process, such as moisture and temperature fluctuations or changes in production speed, are understood.

DC long-term graphic (Deviation Control)

The DC value provides information on how homogeneous the panel was produced. The higher the DC value, the more inhomogeneous production, the higher the probability for blisters to occur. The DC value indicates technical problems with glueing, spreading, pressing, or similar upstream processes.

Technical specifications

Supply voltage230 V / 115 V
Frequency50 Hz / 60 Hz
Power consumption750 VA
Compressed air supply6 bar / 90 ps
Compressed air consumptionapprox. 145 l/h/ 0.1 cfm
Max. number of inspection channels per electronics evaluation24
Panel thickness1 to 55 mm / 0.04 to 2.17 in
Conveying velocitiesmax. 250 m/min / 750 fpm
Minimum detectable defect size25 x 25 mm / 0.98 in x 0.98 in
Diameter of measuring spot50 mm / 2 in
Min. distance between 2 inspection channels100 mm / 3.94 in


Any more questions?


GreCon measuring systems are generally equipped with the online support GreCon SATELLITE. On demand, this system provides safe and fast remote support. Each online support is logged and stored in the system’s history.


Contact us

Our international service team is available worldwide. Select the service package that is suitable for your requirements from our modular range of services. We will be pleased to advise you!

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our service


The GreCon measuring systems are designed for a use in an industrial environment. The GreCon after-sales-service is available to you for any questions or the elimination of problems so that the systems provide maximum benefit and offer high availability even over the long term.

  • Our experts ensure an optimal and reliable function of your GreCon measuring systems in agreed intervals.

  • The GreCon measuring systems are equipped with the GreCon Remote Support SATELLITE to support the operators. This system makes a safe, easy and quick remote support possible in case of any possible failure, to control the system or to answer questions.

  • Qualified specialists with comprehensive practical experience are available to you for any questions and support in case of problem - 365 days the year.

  • As internationally acting company, GreCon offers a worldwide network of subsidiaries and sales and service partners with internal qualified service staff. Thus, a competent partner is available to you in case of need within very short time and in short distance.

You will find further information on the GreCon after-sales-service pages.

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