Pressure measurement apparatus (101) for an engine, the pressure measurement apparatus (101) comprising: a gas flow path component (105) of a gas flow system of an engine; and a differential pressure sensor (103) having a sensor body (107) defining first and second pressure ports (113A, 113B), wherein the sensor body (107) is configured to cooperate with an opening (115) in a wall of the gas flow path component (105) so that the first pressure ports (113A) terminates inside the gas flow path component (105) and the second pressure port (113B) terminates outside of the gas flow path component (105) in an assembled configuration.
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