Electrokinetic delivery systems, devices and methods

An electrokinetic pump system comprising:

• a pair of double-layer capacitive electrodes having a capacitance of at least 10−2 Farads/cm2;
• a porous dielectric material disposed between the electrodes;
• a reservoir containing pump fluid;
• and
• a power source connected to the electrodes;
• the electrodes, dielectric material and power source being adapted to move the pump fluid out of the reservoir substantially without the occurrence of Faradaic processes in the pump.

A displacement pump comprising:

• a dispensed fluid reservoir;
• a pump outlet;
• a displacement mechanism;
• a power source adapted to operate the displacement mechanism;
• and
• a housing containing the reservoir, pump outlet, power source and displacement mechanism, the housing having a volume no more than 250% of the volume of the dispensed fluid reservoir;
• the displacement mechanism and power source being farther adapted to dispense substantially all of dispensed fluid from the reservoir through the pump outlet at a flow rate no more than 1 microliter/minute with a steady state flow rate error of no more than about 5%.

A pump comprising:

• a reservoir of pump fluid;
• a pump mechanism operable on the pump fluid;
• a pump outlet;
• a power source connectable to the pump mechanism to move pump fluid from the reservoir through the pump outlet at a flow rate no more than 1 microliter/minute with a steady state flow rate error of no more than about 5%;
• and
• a housing containing the reservoir, electrodes, pump outlet and power source, the housing having a volume no more than 150% of the volume of the reservoir.