Rejection central phase

A phase-sensitive detector (PSD) constitutes the central part of instmments commonly known as lock-in amplifiers. Effectively, a PSD responds to signals that are of the same frequency and phase with respect to the reference waveform aU others are rejected. One... 

The lighter oil droplets migrate toward the inner central core where an axial reversal of flow occurs, resulting in the removal of the lower-density oil-enriched phase through a small-diameter orifice (the reject port or the vortex finder) located in the center of the inlet head. This stream is also known as the reject stream or the overflow. The oil-depleted water stream exits from the downstream end (also known as underflow). 

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