A spectrally-encoded label comprises a spectrally-selective optical element having a label spectral signature. A maximum speed Vmax is calculated by accelerating and then decelerating a stage when moving the stage by the width of one of the blocks of the tentative block size La. In this initial current path, there is at least one triggering component which can be triggered from an off-state to an on-state. The second oligonucleotide has a fluorophore attached thereto and the third oligonucleotide has a quencher attached thereto. Making the outlet portion or surface irregular as described herein provides paths for entrapped air to escape or vent during start-up, thereby significantly reducing or eliminating the need for potentially harmful corrective action, such as rapping, to achieve a rapid filter start-up. The liquid and air mix within in the mixing chamber.