A simple tool for creating 2D concentric arcs and circles.

Ophthalmic radiuscope. Unit consists of a fine compound microscope with concentric coarse and fine focusing adjustments. It includes a 6.5 V lamp, monochromatic filter, two lens mount and a built-in variable voltage selector. For contact lenses measuring and inspection.

The 3 CEP Multi +system (internal version) is a specially designed concentric common shared system chimney for flue gas evacuation and air supply for domestic room-sealed C42, C43, C42P & C43P boilers in flats & apartments, ideally suited for new build projects. This innovative system allows the connection of 2 up to 20 boilers. In renovation projects, it is an ideal solution in cases where multiple room-sealed condensing boilers cannot be installed on the face of the building and there is a usable service shaft or existing U-duct. This system requires the use of the Poujoulat flue gas non-return valve unless the boiler is provided with its own non-return valve. All of the products offered by Cheminées Poujoulat have been rigorously tested in every configuration by the CERIC Laboratory to ensure they meet highest standards (Building Regulation Document J - Amendements to Approved Documents).