The KI Discus Test

The KI (potassium iodide) discus test is defined in the European Standard for microbiological safety cabinets, EN12469:2000 as a test method for validating the operator/aperture protection performance of the cabinet.


The KI Discus test has been designed to enable operator/aperture protection factors to be measured for class I and Class II open-fronted biological safety cabinets. Unlike test methods employing a micro-biological aerosol challenge this technique enables cabinets to be evaluated without the risk of microbiological contamination of either the biological safety cabinet or the laboratory and results are available almost immediately.


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