BOSTON--(BUSINESS WIRE)--PerkinElmer, Inc. (NYSE: PKI), a global leader in Health Sciences and Photonics, today announced that it has signed a three-year agreement with Schering Corporation, a subsidiary of Schering-Plough Corporation, to provide and implement its OneSource® maintenance solution at four Schering-Plough laboratory sites in New Jersey. This represents the extension of an existing relationship between these companies for analytical and life sciences instrumentation and related services.