A self-leveling sensor assembly comprising an outer bushing defining a bushing passage, a bushing axis extending centrally through the bushing passage; an inner housing received in the bushing passage and rotatable about the bushing axis, the inner housing comprising a housing weight disposed at a first housing side of the inner housing; and a vibration sensor mounted to the inner housing and defining a sensor axis; wherein the housing weight is configured to pull the first housing side of the inner housing downward to rotate the inner housing and the vibration sensor about the bushing axis and to align the sensor axis is a desired orientation.