This is very fast and simple: just put a ruler or guide on the bench and cut the samples in a strip approximately 10 cm wide. Then insert the film samples into the supplied support rack with guide rollers. The width of the film sample does not have to be accurate, e. g. it can be anything between 7 cm and 10 cm, as the equipment reads in an area of only 4.5 cm. So, no time needs to be lost when preparing the samples. It’s quick and easy.
What is the GPA?
The GPA Evo is used to measure the thickness profile of the film offline for quality control. This is achieved by measuring a cross-sectional film sample cut from a film reel.
This device is equipped with two sensors, a capacitive sensor without contact and a micrometer that takes a number of absolute measurements for automatic calibration.
The entire measuring process is automated. The new functions include the automatic stop for segmented films and the automatic elimination of the thick spots left by adhesive tapes used for joining segmented film.
A unique equipment, robust, with high technology and simple to operate. The unit is handled by two operating buttons on the measurement unit and the GPA-Win program on the PC.
Why use the GPA In your company?
Learn about the benefits of using the GPA in your Company.
In its 6th generation of GPA units, the GPA Evo has become the most accurate equipment, easiest to operate and with an even more complete software compared to previous generations. As such, the GPA is not only the most complete but also the best-selling measuring equipment in the world.
The GPA does not need any exterior calibration. Calibration is carried out automatically and accurately during the measurement and with point 0 (zero) as reference point being set with each new measurement. This equipment is used to measure the film thickness, around the circumference of the bubble on blown film and across the web on flat film extruders.
Benefits and Advantages
of using the GPA

Automatic calibration
Automatic measurement after positioning film sample
Non-contact measurement
Adjusting and calibrating extruders
Suitable for measurement according to ISO and DIN




Do it like the leading extrusion machine manufacturers, who use our system for calibrating their extruders and maintaining quality.
Software
GPA-Win
This software has been specially developed for the GPA film thickness measuring units. With the PC connected to the GPA by Ethernet, all set data required for the measurement is entered by the operator. Once the measurement is finished, the software automatically saves the measurement data and the thickness profile. Even if you are not connected to the GPA, there is the possibility to process and evaluate the recorded profiles.
Quality in
every detail
See our GPA photo gallery. The complete product in every aspect.
Present in
companies all over the world.
Large companies rely on our solutions.
We are a reference in technology for the plastic industry.































Talk to Octagon
We are a technology center which has guaranteed our customers spare parts and technical support for over 30 years. As holders of an unequalled record of keeping systems running for 30 years, 24 hours a day, we are proud of the stability of our systems and the quality in technical support.
Components
The GPA consists of the following components:

Support Rack
Support rack for easy and correct positioning of film samples.

Software GPA-Win
The GPA WIN software comes with operating system and manual in English including tutorial videos.
All the software we use on our equipment is developed by Octagon.
Intuition is
our focus
Our software is incredibly easy to use. Here’s some of the data you’ll see on the screen:
Cartesian chart
Polar chart
Gauss distribution
Tolerances (%, μm, 1-, 2-, 3-Sigma)
Cpk machine capacity
Fourier Analysis
Profile analysis

Download the
GPA guide
Click the button below to download the GPA guide and it will be sent it to your E-Mail address.
Coming soon.Stay tuned!

Frequent questions

Who we are.
What we do.
Welcome! We are Octagon, a world reference in technology for the plastic industry.

Automatic Air Ring

Thickness Sensor

GPA Evo

Width Measurement

Gravimetric Dosing

Special Products

Software

Automatic Width Control

Upgrade of Blown Film Extruders and Co-Extruders

Take advantage of all the benefits of the GPA. Acquire it for your Company.
Octagon measuring equipment: We have been leaders in thickness profile control and measurement for over 30 years.
Octagon Blown Film Control GmbH:
Nuernberger Straße 119 D-97076 Wuerzburg, Germany.
Telephone +49 931 27 96 70 Fax +49 931 27 96 799
contact@octagon-gmbh.de