A fuel metering unit includes a metering valve and a sensor. The metering valve includes a valve body movably disposed within a valve housing. The valve body defines a first bore that extends from a first valve body end towards a second valve body end along a first axis and a first window that extends through the valve body along a second axis. The sensor extends at least partially through the valve housing and faces towards the first window. The sensor being arranged to provide a signal indicative of a position of the first window relative to the sensor.
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