Series and lot number

Through our automated system, we can always digitally retrieve the correct lot number (carbon) or piece test (H13) based on the serial number on the filter. The history of a carbon filter, for example, can thus be traced back to coconut husks or coal mines!

Accurate production of filters

Using a kerosene test, EN1822 filters are checked for leaks on a test bench on a piece-by-piece basis.

Any small hole in either the bonding of the filter or the filter cloth leaves a visible plume of smoke that allows the tester to see if the filter should be rejected (and destroyed).