A hand-held, portable dispensing device is described for dispensing a curtain spray pattern of liquid which includes an elongated tubular body having an open end and a closed end. The processes provided enable polymerization processes to be practiced with minimal fouling in the reaction system, and allows for the recovery of the fluorinated hydrocarbon and other hydrocarbons such as hydrocarbons for reuse in the process or hydrocarbon by-products from the polymerization process. The invention more particularly relates to such particles having a noble metal-containing core, and more particularly, a platinum or platinum alloy core. The at least one piezoelectric sensor is responsive to movement of the flexible catheter shaft by generating electrical signals corresponding to the amount of movement.