Concentrated suspension of 2.5 µm polystyrene microspheres, in aqueous solution, that can be excited by a UV light source. A dilution of this suspension serves as a reference standard for laser alignment and focusing as well as for daily QC of flow cytometers equipped with a UV excitation source.

Reagent component:

• 1.5 mL Calibration Beads UV 2.5 µm Concentrate