KCB COVID19 Antigen Rapid Test

SARS-CoV-2 screening

The KCB COVID-19 Antigen Rapid Test is a rapid chromatographic immunoassay for the qualitative detection of SARS-CoV-2 antigens present in the human nasopharynx.

It is reserved for professional in vitro diagnostic use.

  • Detects antigens of SARS-CoV-2, responsible for COVID-19
  • Nasopharyngeal swab
  • No laboratory analysis
  • Indicates whether the patient is infected or not at the time of the test
  • Result in 15 minutes
  • CE marked & Approved by the French Ministry of Health.
  • Sensitivity >96%, Specificity >99% vs RT-PCR

Box of 20 tests including everything necessary for the realization

20 test cassettes
2 vials of buffer
20 sterile nasopharyngeal swabs
20 extraction tubes
1 tube holder
1 user manual

Ask us for a quote on +33 (0) 4 70 08 08 80

Mail: info@kappa-city.fr


COVID-19 Antigen Rapid Test


Our mission & values

Kappa City Biotech SAS

Diagnostic In Vitro & Lateral Flow

Founded in 2005, Kappa City Biotech SAS is specialized in the manufacturing of In Vitro Diagnostic (IVD) medical devices, and more particularly of lateral flow immunoassays, or in other words, rapid tests based on the principle of an antibody/antigen reaction.

We pursue a triple objective:

  • Provide our professional clients with cutting edge diagnostic tools, easy to use, of premium quality, and of course made in France
  • Democratize the use of rapid diagnostic tests among the general population, and thus, meet the pressing need of private individuals for this type of helpful tool.
  • Contribute as much as possible to France’s international reputation for excellence in biotechnologies
We manufacture the NarcoCheck® rapid drug tests


Simple, innovative, reliable and rapid diagnostic solution

Lateral flow tests

These rapid tests are based on the principle of immuno-chromatography. They are in the form of small test strips, which can detect the presence of different types of biological markers in a sample. They deliver results in minutes. The results can be qualitative (positive / negative) or quantitative, by using a reader.


The market of lateral flow tests is constatntly expanding, due to their simplicity and the constant improvement of their performances. Their use has been particularly growing in the recent epidemic context, as they are very suitable for emergency situations and massively spreadable on a very cost effective way.


Compared to heavy laboratory techniques, the advantages of these tests are numerous: speed, ease of use, portability, versatility and high reliability. From the collection of the sample to be analyzed, to the result of the test, it often takes no more than 10 minutes.


The potential of lateral flow rapid tests is absolutly enormous, as they can provide fast and easy solutions in many sectors, such as the medical field, of course, but also agriculture, the environment, hydrocarbons, industry and many other areas. Imagination really seems to be the only limit.


Reliable rapid tests

Rapid tests for drugs of abuse (DOA

With real expertise in narcotics and addictive drug substances, we have been marketing the NarcoCheck® line of products, which offers one of the most complete catalogs of urine, salivary, and forensic test. We now can detect more than 200 different psychoactive substances. Our product catalog and our list of identifiable parameters are constantly growing, in order to keeps in step with new consumption trends and the new needs of professionals in the field

Trusted supplier of the most demanding professionals, such as public or private hospitals, laboratories, police forces, customs departments and coporations form many sectors, we also have a large activity with private individuals, through our online shops and websites.

The quality of our manufacturing lines and products is ISO 13485 certified by LNE-GMED, the benchmark French certification body.

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To best meet the specific and heterogeneous demands of our customers, our offer today is structured around two distinct areas:



Learn more

B2B wholesale is mainly done through the NarcoCheck.com site, whose function is to present to professionals the various tests that we manufacture for drug and narcotic screening. This site is dedicated to corporations, health professionals, police forces, customs, pharmacies and associations. Visit the website.


Learn more

Retail is mainly done on our e-commerce site TestDrogue.fr. The possibility thus offered of obtaining drug and narcotic drug tests represents today a fundamental help for thousands of parents, who place these devices at the heart of their family prevention policy. Visit the website.

Custom development

You have a project?

Our Research and Development department is at your disposal to study your project. Whatever you marker of interest can be, there must be a solution to screen and detect it with a lateral flow test.

And if you haven’t identified yet the specific marker of the the product or molecule you wish to screen for, we will help you find it!


Project evaluation

Confidentiality agreement
Project presentation
Feasibility study



Research and/or Development of raw materials (antibodies, antigens)


R & D

Definition of quality criteria
Concept and design



Clinical or field studies
Technical files for CE marking or certification



Upscaling and load up



Consulting and
Technical assistance
Commercial strategy


TEAM Frederic



« Impossible n’est pas FrenchTECH »

TEAM Hector


The Artist (R&D Manager)

« Just give me a target ! »



Let’s keep in touch!

To visit us

32 rue Danton,
03100 Montluçon, France

To call us

+33 (0)4 70 08 08 80

To write us


Ready for all your projects.

Just contact us !

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