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What is the
Width Measuring Sensor?

Two discs with sensors are positioned at both edges of the film. On film without gussets the film passes over the front of the discs. On film with gussets the discs are positioned inside the gussets so that all four edges can be detected for calculation of the width.

There are two infrared sensors on each sensor disc one on the front and one on the back of the disc. The measurement takes place by the four sensors detecting the two front and the two rear edges of the gussets.

With gusseted film it is necessary to enter in the computer the depth of the gussets and the total nominal width in terms of mm.

It is possible to set the maximum and minimum variation tolerance, both in the gusset depth and in the total width. If these tolerances are exceeded an alarm is triggered.

Parameters on display

GMS Geral software

Why use the width measurement in your plant?

Learn about the benefits of using this equipment in your company.

Ensures constant product quality

Keeps the selected tolerance range to the minimum

Reduces customer complaints

Protects against errors in manual measurement

Quality in
every detail

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Present in
companies all over the world.

Large companies rely on our solutions.
We are a reference in technology for the plastic industry.


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Frequent questions

Yes, the system informs on the depth of the front gusset in relation to the rear gusset.

Yes, the GMS sensor is a complete system for width measurement with and without gusset. Equipped with two infra-red sensors on each side it can detect the two edges on film without and the four edges on film with gussets.

Yes. An alarm is triggered as soon as the film edges move outside the desired tolerance and when the measured width steps outside the tolerance limits.

For all films that need precise widths. It controls the gusset depths as well as the overall width of the film, therefore providing the perfect quality control with the provision of reports if required.

This is pretty simple, it only needs cleaning the sensor and lubricating the moving parts.

Yes. Modern extruder manufacturers integrate our sensors for automatic gusset control in the collapsing frame and in the bubble cage with IBC for automatic width control. For electronic integration a + and – signal is provided.

Yes, please send an e-Mail to:
Mr. Klaus Janzen (Sales Manager)

Who we are.
What we do.

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

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Automatic Air Ring

Sensor de Espessura PMS-B - Octagon Blown Film Control

Thickness Sensor


Width Measurement

Gravimetric Dosing

Special Products


Automatic Width Control

Upgrade of Blown Film Extruders and Co-Extruders

Take advantage of all the benefits of the Measurement Sensor. 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