"By using this assembly a Personal Sampling Pump will act as a low flow sampler enabling it to be used with Sorbent Tubes for sampling gases and vapours. The assembly consists of a moulded plastic Back Plate, one Low Flow Adaptor with a Sorbent Tube Holder connected with Silicone Rubber tubing to a Constant Pressure Controller and a further piece of Silicone Rubber tubing to connect to a Sampling Pump. The back plate can hold one or two assemblies and by linking the assemlies together dual tube sampling is possible. The Low Flow Adaptor is available separately if dual sampling is required and each assembly is individually adjustable. When sampling with two assemblies an equal �Y� tubing connector is required"