All the components of the appparatus are mounted on a steel base plate, measuring about 140mm x 241mm, by which the device is secured to the flue ducting. The elector tube can be rotated to any of four positions to suit the direction of gas-flow and has an adjustable nozzle in its throat to permit regulation of the suction. The probe-tube can also be rotated to any position to suit the direction of flow and is locked with locking-nuts. The cyclone body is surrounded by an electrical heating-jacket to eliminate condensation, which would cause solids to accumulate in the cyclone instead of falling into the glass vessel. The cyclone can be readily removed from the assembly to facilitate periodic cleaning. The rating of the heater is 100W at 110V, or 240V and a plug-and-socket connector is provided on the cyclone bracket for connection of the supply. Two manometer tapping points are provided, one at the inlet and one at the outlet of the cyclone, for initial setting-up on installation.

The sampling-vessel is of glass. It is secured in position below the cyclone by a U-clamp and winged screw and can be quickly removed when the screw is slackened. The sampling-nozzle is stainless steel and is available in 4 sizes - 9.52mm, 12.7mm, 15.87mm, or 19.05mm. The customer has to choose one size for a standard order, the choice depending mainly upon the gas velocity in the duct. It is secured to the end of the probe, which can be of any length up to 3 metres.