Capillaries and Fittings for HPLC Systems

A wide range of capillaries and fittings for Agilent, Thermo Scientific (Dionex), Shimadzu and Waters HPLC systems. A comprehensive range of capillaries and fittings manufactured to the highest level of quality to protect the integrity of the chromatographic results.

HPLC capillaries and fittings are essential flow path components used to connect pumps, autosamplers, columns, and detectors within an HPLC or UHPLC system. The right HPLC capillary tubing helps maintain pressure stability, minimise dead volume, and reduce extra-column dispersion, supporting sharper peak shapes, high sensitivity, and reproducible chromatographic performance. Poorly matched tubing or fittings can lead to leaks, peak broadening, or secondary interactions with analytes, making the correct length, internal diameter, material, and connection style important for every method.

At Crawford Scientific, we supply a range of HPLC capillaries, fittings, ferrules, connectors and unions for routine replacement, system configuration, and method optimisation. Capillaries are available in materials such as stainless steel for robust high-pressure applications, PEEK for flexible low-pressure connections, PEEK-lined stainless steel or titanium for bio-inert workflows, and specialist materials for microflow or high-performance applications. With options covering different internal diameters, lengths, pressure ratings, and fitting styles, these capillaries create secure, low-dead-volume connections and keep HPLC systems operating efficiently across analytical, UHPLC, bio-inert, and preparative workflows.