Abstract: A sampling probe, particularly suitable for use in withdrawing air from a cargo container and leading the withdrawn air towards a mass analyser to check for drugs and explosives, comprises a plurality of hollow interconnected sections. Their internal surfaces, including collars supporting inner tubes co-axially with outer tubes, are of inert plastics material such as PTFE and are substantially continuous through a coupling between each pair of adjacent sections. The couplings each include a pair of spring catches having teeth to be held in an annular groove by a slidable sleeve. Tongues engage in cutouts to permit transmission of torque. The end section has air openings and can have a hook to allow it to be hung over the upper edge of a vehicle side. The termination section has part of a quick release coupling and can have a bend for use in orientation and manipulation.