These units are designed to give the user easy selection of measurement from various sampling points, for example from multiple gas cylinders, exhaust stacks or engine test cells. It is often mounted upstream of a main filtration unit (e.g. the Signal model 350), or downstream of smaller local filters (e.g. the Signal model 363SM).
Available as heated or non-heated, 4, 6, 8 or 10 inlets can be chosen along with a single outlet as standard. With up to 30 inlets and 3 outlets, and backpurge, boost pump, integrated line control, and various automation options also available, these versatile units can provide excellent value for money for mid-to-large scale gas analysis projects.