德国Spherotech
Spherotech公司是全球最知名的微球产品生产商之一。Beckton Dickinson（BD）公司即用Spherotech的Rainbow荧光微球来对其流式细胞仪进行灵敏度的校验。
Spherotech公司生产的微球广泛的应用于生物医学研究和诊断，包括免疫荧光和免疫酶学检测等。其微球适用于荧光显微镜技术、激光共聚焦（Confocal）技术、流式细胞术、影像细胞术、磁性细胞分离技术、磁珠酶免测定法(EIA)等多种检测方法。
Spherotech常规生产高质量的乳胶微球、荧光微球、顺磁性微球、铁磁性微球和多种有色微球，这些微球表面可根据应用的需要添加不同的功能基团(如羧基和氨基等)。此外，Spherotech公司还生产各种包被有抗体或配体，如亲合素、链霉亲合素和生物素等的微球，用于免疫学的研究和临床。

Spherotech was established in 1992 to manufacture and supply uniform microparticles for biomedical and diagnostic applications. It is located in Lake Forest, Illinois, about 25 miles north of Chicago. From inception, Spherotech has established itself as a reliable source of various microparticles. Our experienced staff working in our well-equipped laboratory and manufacturing facility routinely makes high quality latex, fluorescent, paramagnetic, ferromagnetic and various colored microparticles. The surfaces of these particles are modified with functional groups to suit various applications. We also manufacture particles that are coated with various antibodies or ligands such as avidin, streptavidin and biotin for immunological applications.

Microparticles manufactured by Spherotech are used in applications such as fluorescence immunoassay, enzyme immunoassay, fluorescence microscopy, confocal fluorescence microscopy, flow cytometry, image cytometry, magnetic cell separation, magnetic particles EIA and many other applications.