Hygienic design

For the pharmaceutical and food industries

Food industry

Why a hygienic design?

In the beverage and food industry, but also in the chemical and pharmaceutical industry and in cleanroom processes, stringent hygiene requirements must be met. This applies to the people working there as well as to the machines, plant and accessories. The need for reliable standards of hygiene and for rigorously implemented norms and guidelines is becoming ever more important. This starts in the earliest stages of the design and planning of new devices.

What constitutes a hygienic design?

A hygienic design refers to the design of machinery, plant and components that are easy to clean and maintain in a hygienic condition for use in areas where hygiene is a priority, such as in the production of foodstuffs and pharmaceutical, cosmetic or biotechnical products. Hygienic design also includes design principles for preventing design deficiencies that promote hygiene-related hazards or the risk of infection, illness or contagion. This is the only way to ensure that no contaminated foodstuffs, cosmetics or medicines find their way onto the market and into the hands of customers.

Guidelines and regulations

WERMA’s system of hygienic design is based on the following guidelines, amongst others:

  • Machinery directive 2006/42/EC (Annex I, Section 2.1): Machinery intended for use with foodstuffs or with cosmetics or pharmaceutical products
  • DIN EN 1672-2-2005: Food processing machinery - Basic concepts, Part 2: Hygiene requirements

The solution: CleanSIGN LED signal tower

CleanSIGN was specially developed and constructed by WERMA for use in areas with strict hygiene requirements. The relevant standards and guidelines were taken into account right from the start, as were the requirements of experts and specialists in the field of hygienic design. CleanSIGN is the world’s first signalling device to be developed in line with European Machinery Directive 2006/42/EC and hygiene standards. Thanks to its revolutionary shape, smooth surfaces and selected materials, CleanSIGN meets the high standards of hygienic design. CleanSIGN has no grooves or seams that could collect dirt, for example. So it is easy and quick to clean. This is a prerequisite and an important contribution to the safe and clean production of foodstuffs, cosmetics and pharmaceutical products.

More about CleanSIGN

  • Ensures food safety through the absence of uneven surfaces, bumps and depressions, where dirt can accumulate
  • Easy-to-clean, hygienic design for optimal cleaning and disinfection
  • Materials are safe for use in food preparation and storage (FDA approved) and resistant to cleaning agents
  • Fraunhofer IPA approval
  • High protection category: IP 67/IP 69K
  • Meets air purity class 2 in accordance with DIN EN ISO 14644-1
  • Pine Tree Clip® (quick fastener) for quick and easy mounting
  • Extremely simple installation and connection
  • Electronic modularity of the individual tiers
  • Integrated loud buzzer
  1. More safety and higher quality for your own products
    • Prevention of impurities
    • Reduced risk of contamination
  2. Less cleaning required
    • Easy and complete removal of dirt thanks to easy-clean design
    • Quick and efficient cleaning saves on energy and cleaning materials
  3. Higher productivity
    • Reduction in equipment downtime, resulting in lower maintenance costs
    • Maintenance-free LED technology with a service life of up to 50,000 hours


  • Diameter: 70 mm
  • Power supply: 24 V
  • For the pharmaceutical and food industries

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