The LPM Series of Fixed Volume Dispense Pumps are solenoid driven, chemically inert, positive displacement pumps, which provide accurate and repeatable dispense volumes of 10 to 25 µL in a small lightweight package. Requiring a simple square wave electrical signal for operation, the pumps aspirate fluid when energized and dispense fluid when de-energized, while their normally closed design with integrated check valves prevents siphoning when the pumps are de-energized.