The BioPAT® Spectro UV single-use pipe is designed to minimize dead volume without impacting fluid dynamics and avoiding a significant pressure drop across the flow path. The optical path length (OPL) is fixed for all single-use pipe sizes independent of the inner diameter of the tubing assembly.This is achieved through a state-of-the-art manufacturing technique of the quartz cell, which ensures a reproducible and easy-to-assemble, single-piece component. The mechanical interface of the BioPAT® Spectro UV probe head fits all sizes of the single-use pipe and calibration pipe, and its compact design assures a small footprint in the integration.