The firm made the acquisition in late 2015 and changed the name to Romer Labs Deutschland to secure continuity of the business in the German market.
Transia was in the process of finding a successor for the business after its founder - Klaus Jürgen Daniel - passed away in 2014.
Romer Labs said direct access to the German market will enable it to provide support and services to customers in the country.
The firm is represented in more than 60 countries either directly or through distributors.
It operates four accredited laboratories in Austria, UK, US and Singapore.
Romer Labs Deutschland product portfolio
Romer Labs Deutschland will offer testing and services in addition to the product portfolio of Transia in the areas of microbiology, cleaning and hygiene control.
Established products are dip-slides for hygiene control, consumables and lab equipment.
Thomas Weber, managing director of Romer Labs Deutschland, said the renaming of the business was an ‘important step’ for employees and business partners.
"With the successful integration of Transia into Romer Labs, our customers can now benefit from over 60 years’ worth of experience in the field of food and feed safety.“
Romer Labs Deutschland has tests covering mycotoxins, food pathogens and allergens, meat speciation, gluten, GMO, veterinary drug residues and other contaminants using technology in the fields of chromatography and immunological analysis
It will provide such services via the laboratory in Austria.