UV-C lamp for safety cabinets

UV-C disinfection system

The built-in UV-C sterilisation system disinfects the workspace with a large disinfection effectiveness  thanks to its high performance and shadowfree irradiation. A high irradiance at a wavelength of 254 nm ensures a rapid killing of microorganisms (for example, about 220 μW / cm² according to the manufacturer of UV lamps for models with a width of 190 cm).

From this theoretical LD90 values (kill rate: 90%) yield of vegetative bacterial cells and yeast of <2 minutes, bacterial spores (Bacillus subtilis) <5 minutes DNA and RNA viruses gen gen <3 minutes, fungi<10 minutes. Few specific exemptions of certain viruses and fungal spores require higher exposure times, so as Aspergillus Niger (spores) about 25 minutes and specific HIV Virus (H9) 40 min.

The appropriate exposure time can be set via the timer on the centrally located touch screen.

UV-C irradiance for claire® safety cabinets

Berner International has made further investigations on the claire® safety cabinets to find out what the irradiance on the work surface is represented in reality. This information is important for making statements about how the positioning of the UV tubes influences the effectiveness of the disinfection.

Measurements of the irradiance on the Claire B-2-190 at 126 measuring points in a 10x10cm grid on the level of the work surface show that the manufacturer's specifications on irradiance are achieved in practice here at every point. The lowest value measured in the rear corners of the safety cabinet was 0.2 mW/cm² (manufacturer's specification approx. 0.22 mW/cm²). However, what is much more important, is that in the critical working areas, optimum irradiances of up to 0.78 mW/cm² are achieved, which are higher by a factor of 2 to 4. These critical, but in Berner safety cabinets most strongly irradiated zones are located along the V-shaped recessed front suction openings and in the area of the work surface where most manual activities with microbiological material take place.

Please contact us if you have any further questions.