A hand-held dispensing device operable to dispense a fluid as an atomized spray by hydraulic pressure. The device includes a cartridge containing a fluid to be dispensed and a pressure-multiplying piston pump operable by liquefied gas pressure and manually controlled by a valve. The pump is configured to receive pressure from a compartment containing liquefied gas and transmit higher pressure to the fluid to be dispensed. The pressure multiplying pump produces high pressure, typically between 6-30bar, which is suitable for generation of fine spray by hydraulic atomization. The device uses about 1/10
th the amount of liquefied gas compared to a propellant-based aerosol therefore it has a significant ecological and health benefits.