Concentrated suspension of 3.0 - 3.4 µm polystyrene microspheres, in aqueous solution, that can be excited by a red light source. A dilution of this suspension serves as a reference standard for laser alignment and focusing of flow cytometers equipped with a 635-640 nm laser. A dilution of APC Beads 3.0 – 3.4 µm Concentrate can also be used for daily quality control with standard settings.

Reagent component:

• 1 mL APC Beads 3.0 – 3.4 µm Concentrate