Fluid filter cartridge - with dye capsules to show presence of oil in fluid

摘要

The cartridge comprises a transparent housing having at least one fluid inlet aperture and at least one fluid outlet aperture, a micro-fibre cylinder supported within the housing and separating the or each fluid outlet aperture from the or each fluid inlet aperture, an adsorbent filter medium packed within the cylinder, a diffuser of porous plastics material disposed between the or each fluid inlet aperture and the adsorbent medium and a plurality of oil-soluble dye capsules distributed within the adsorbent medium.