Introducing the Aura CL, the first subvisible particle detection platform specifically designed for cell and gene therapy applications. In as little as 5 µL, the Aura CL can quantify subvisible particles and ID them as cellular, protein, viral capsid, or extrinsic material in a matter of minutes. The Aura CL uses a direct and specific fluorescent labeling approach so there is no need to rely on inaccurate morphological characteristics. Based on USP 788, the Aura CL is easy to validate and incorporate into all particle testing workflows.