A Two-part, Syringe -based Electrochemical Dispenser. The dispenser consists of a disposable syringe- like fluid storage reservoir (1) and a reusable fluid driver. The driver is located at the proximal end of a conventional syringe; the fluid exit port at the distal end. The driver generates a gas that inflates an elongated bladder (6) situated within the filled syringe. Expansion of the bladder releases liquid at a rate nearly identical to the gas generation rate. The dispenser is held in a vertical position with the distal end pointed downward. Liquid is released drop -wise onto a porous material (4) from which it can evaporate. A battery- driven electrochemical oxygen generator is the gas source. Means to attach the dispenser in its vertical position are provided. Such dispensing devices can be used to release pheromones, repellants, insecticides, fragrances, etc.