Oil separator for reducing residue deposits

An apparatus comprising:

• a pressure sensor having a pressure sensing element in fluid communication with a port;
• an oil separator in the port, the oil separator configured to reduce an amount of oil-vapor residue that reaches the pressure sensing element by elongating a path of fluid from an opening of the port to the pressure sensing element and by creating additional surface area within the port upon which oil-vapor residue may be deposited, the oil separator including a plurality of discs, each disc having a cut-out portion, the cut-out portions of adjacent discs being rotated relative to one another about a longitudinal axis of the oil separator thereby creating a tortuous oil-vapor flow path involving oil vapor separating into separate flow paths below a disc, the separate flow paths flowing around opposite sides of a longitudinal axis of the oil separator toward a cutout portion of the disc, the separate flow paths then recombining into a single flow path that flows up through the cutout portion of the disc, the single flow path then separating again into separate flow paths that flow away from the cutout portion of the disc, above the disc, and around opposite sides of the longitudinal axis of the oil separator;
• and
• a cover having a plurality of holes and being configured to:
• prevent the oil separator from falling out of the port, and function as both a mechanical stopper and a rough filter.