Abstract: An apparatus for testing the emissions, content or permeability of samples of materials, comprises at least two sample chambers (5a,5b), each in communication with a receiver (9a,9b) for a sorbent trap (10a,10b), a gas inlet conduit (2) having at least two gas delivery conduits (3a,3b), arranged to deliver gas to respective sample chambers, and at least two gas-flow impedance devices (4a,4b), arranged to control the flow of gas through respective sample chambers and through respective sorbent traps. The gas-flow impedance devices preferably comprise a body of porous material and serve to ensure that the rate of flow of gas is substantially the same through each and every sample chamber, regardless of whether a given sample chamber is in use, with a sorbent trap in place or not, or if different sorbent traps are in use for the different sample chambers.

Abstract: A sampling device containing an adsorbing material and fitted with a cap formed with an elongate passage through which gases may pass into and out of the device. When fitted to the device, the elongate passage in the cap effectively seals the device, requiring a flow of gas to be driven through the device to obtain a sample therefrom.

Abstract: A sampling device comprising an elongate tube and an identification device. The identification device comprises a transponder which is removably attached to the tube by means of a clip. The identification device may thus be removed from the tube prior to analysis and/or replaced between successive sampling operations.

Abstract: A sampling device comprising an elongate tube and an identification device. The identification device comprises a transponder which is removably attached to the tube by means of a clip. The identification device may thus be removed from the tube prior to analysis and/or replaced between successive sampling operations.