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Biological testing


Our devices are tested upon numerous different pathogens in certified and research microbiological laboratories, extending EN14885 and BS 8628

- Melbec Microbiology Laboratories (UK)
- UGent Laboratory of virology Prof Nauwynck (corona)
- UGent Laboratory of virology Prof Meuleman  (hepatitis)
- UGent Laboratory of bacteriology Prof Cools

Online literature    NIST -  IUVA


BS 8628

This British Standard sets the benchmark for UV-C-LED disinfection efficacy testing, ensuring the highest standards of safety and cleanliness. BS 8628 defines how to measure its effectiveness on surfaces. The test involves irradiating prepped surfaces with the UV device and analysing microbial survival to determine efficacy.


Ultraviolet (UV) irradiation, a well-established method for terminal disinfection, is widely used across industries such as healthcare, agriculture, water, food treatment, airlines, and more. UV devices offer rapid decontamination, taking as little as 5 to 45 minutes, making them a valuable complement to existing cleaning methods, especially in healthcare settings.


To address the lack of standardized testing for UV devices, the European disinfectant standard writing body CEN is set to release a new standard in Spring 2022: BS 8628:2022. This standard is tailored for UV devices, based on the existing EN 17272:2020 airborne surface disinfection standard with minor adjustments. It focuses on assessing the efficacy of UV devices in disinfecting surfaces within enclosed spaces.

In the Efficacy Test of BS 8628:2022, stainless steel carriers are inoculated with microorganisms and placed inside a test chamber. The UV system is positioned at specified distances, and the disinfection cycle begins. After recording the contact time, carriers are processed, and the results are expressed in logarithmic scale for compliance assessment.

Requirements of the BS 8628 standard:

Bactericidal activity: 5lg or greater reduction for vegetative bacteria and 4lg or greater reduction for bacterial spores and fungi on test-carriers compared to control-carriers not exposed to the process for the specified test organisms.


Tests reports: 65928-65929-66293-66294
Test dates: 18/12/2023, 03/01/2024, 16/01/2024

Laboratory: Melbec microbiology (UK)


  1. Staphylococcus aureus ATCC 6538 Gram-positive bacteria

  2. Enterococcus hirae ATCC 10541 Gram-positive bacteria

  3. Escherichia coli ATCC 10536 Gram-negative bacteria

  4. Bacillus subtilis ATCC 6633 sporicidal

  5. Acinetobacter baumannii ATCC 19606 Gram-negative bacteria

  6. Candida albicans ATCC 10231 fungicidal / yeasticidal activity

  7. Aspergillus brasiliensis ATCC 16404 fungicidal

UV-C LED Technology

Germicidal radiation is a proven disinfection method using short-wavelength ultraviolet radiation. 


ZAPARAY uses exclusively UV-C LEDs as environmentally friendly radiation sources to target the DNA/RNA of viruses, bacteria, and molds.


Safety first

Safety switches and special UV-C deflectors protect you at all times against accidental exposure. 


Quality always
100% outgoing quality procedures are our strategic differentiator. 

Made in Belgium

We provide our customers with scientific-based technology in collaboration with VLAIO (Flemish institute for innovation) and the universities of Leuven and Ghent. 


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