Abstract: Apparatus (2) for filtering a fluid used in a machine, which apparatus (2) comprises a filter (4), a pump (6) for pumping the fluid through the filter (4), monitor means (8) for enabling remote monitoring of functioning of the apparatus (2) and the position of the apparatus (2), and a case (10) which contains the filter, the pump (6) and the monitor means (8), the case (10) comprising a body portion (12), a lid (14), and at least one handle (16), the lid enabling the case (10) to be opened and shut for permitting authorised access to the apparatus (2), and the handle (16) enabling the apparatus (2) to be carried by a person whereby the apparatus (2) is portable for facilitating transportation and installation.

Abstract: A filter (2) for filtering mutagens from an engine oil, which filter (2) comprises a body (4), an inlet (12) for oil passing into the body (4), an outlet (14) for the oil passing out of the body (4), and a filter (2) material in the body (4) for filtering the oil as the oil passes through the body (4), and the filter (2) material being such that it comprises activated carbon (16) for removing the mutagens.