Investronic Group, Innovation without limits

An alliance of complementary skills

The Investronic group was born from the targeted addition of complementary technological know-how to offer a complete range of automatic assembly and control machines to our customers.

Discover the group

Automatic control and sorting

- Dimensional checks for sorting high-volume parts.
- Aesthetic checks using Artificial Intelligence.
- Specific industrial checks: colorimetry, profilometer, electrical, tightness, etc.


Robotic assembly machines :
- mechanical (all types of crimping).
- welding (conventional, resistive or laser).
- gluing by precision dosing or other processes.

Presses and equipment

Complete lines of stamping and/or deep-drawing and finishing presses.


Industrial laser processes (assembly, cutting, engraving, pickling, hardening, etc.).

    Group companies

  • Founded in 2002, Optec Industries designs special assembly and sorting machines incorporating optical quality control systems. It develops innovative technologies for detection of all types of defects.
  • Founded in 1992, Aurea joined the Investronic group in 2011. It designs special machines for assembly, inspection, machining, mechanical assemblies and sub-assemblies.
  • Founded in 1996, Amidec became part of the Investronic group in 2018. Amidec specialises in the manufacture of special machines for welding, assembly and packaging. It also designs and manufactures press peripherals, 2 or 3-axis transfers and robotised islands.
  • Based in Saint-Etienne, this company joined the Group in 2022. Xénia specialises in high-power laser technology applications and offers a wide range of services, including laser welding, marking and engraving, micro-welding and precision micro-cutting.
  • Created in 1986, the Sandmann company is located in Alsace. From design to production, Sandmann offers turnkey special machines in various sectors such as medical, pharmaceutical, automotive, food processing...

Uniting and innovating to create the successes of tomorrow

"Alone we go faster, together we go further"

This proverb lends itself perfectly to the philosophy and vision of Christophe Dufresne, founder of the Investronic group, which aims to structure its activities in order to develop them more effectively.

Our aim:

To constantly strengthen our innovation strategy so that we can offer our customers the best state-of-the-art in industrial assembly and control.

Our ambition:

To be the preferred partner of our key account customers, supporting them in the era of automated industrial productivity and Industry 4.0.

Our news

  • 13.07.24

    CEVOLIG compagny joins the INVESTRONIC group

  • 13.07.24

    The INVESTRONIC group announces its merger with the company SANDMANN Machines & Systèmes in the special machine sector.

See all our news


Millions of turnover


years of technological know-how and ingenuity


key account customers loyal to the group for over 10 years


different machines created per year


m2 manufacturing workshop