Pressure detection system immune to pressure ripple effects

A fluid flow system comprising:

• a fluid pathway;
• a pump element disposed at the fluid pathway to urge a fluid flow through the fluid pathway;
• a filter assembly disposed at the fluid pathway upstream of the pump element relative to a direction of fluid flow through the fluid pathway, the filter assembly including:
• a filter housing;
• a housing inlet connected to the fluid pathway to allow the fluid flow into the filter housing from the fluid pathway;
• a housing outlet connected to the fluid pathway to allow the fluid flow to exit the filter housing to the fluid pathway;
• a filter element disposed in the filter housing to collect contaminants from the fluid flow;
• and
• a pressure sensor disposed to measure a pressure drop across the filter element, the pressure sensor having one or more sense lines extending into an interior volume of the filter housing.

A method of monitoring a filter assembly for a fluid flow system comprising:

• positioning a pressure sensor at a filter assembly;
• extending at least one sense line from the pressure sensor into an internal volume of a filter housing of the filter assembly;
• and
• measuring a pressure drop across a filter element of the filter assembly via the pressure sensor;
• wherein the measured pressure drop is indicative of an amount of blockage of the filter element due to contaminants collected at the filter element.