An example linear pumping system suitable for small size and low flow rate operation. The system includes a pump casing that encloses a linear motor and one or two (an upper and lower) pumps. The pump casing may include an upper fluid inlet port, a lower fluid inlet port, and a fluid-outlet port. The linear motor includes a stator and a mover, where the mover includes an upper plunger portion and a lower plunger portion and is configured to move alternately up and down relative to the stator. The upper and lower pumps positioned on both sides of the mover may each include a pump chamber, a fluid inlet valve, and a fluid outlet valve. In operation, hydraulic pressure from the upper and lower pump outlet valves causes fluid within an interior cavity of the pump casing to be expelled through the fluid outlet port. The motion of the mover can be controlled using pressure and/or plunger position measurements.

A dispensing pump having a calibration system including a base including an upper base portion having a first end for mounting a motor and a second end and a lower base portion for mounting a pump on a first end and a second end. A hinge pivotally connects the second end of the upper base portion and the second end of the lower base portion. A linear actuator is mounted on the base and includes a drive rod having a coupler secured to an end thereof. The coupler joins the drive rod to a first end of a connecting member. A second end of the connecting member is secured to the lower base portion. An attachment plate attaches the motor to the first end of the upper base portion. The attachment plate extends outwardly from the motor for mounting the linear actuator. A proximity sensor is secured to the base upper position. A flag is secured to the drive rod coupler, wherein the flag moves directly with the drive rod. The flag includes a body and a calibration element projecting therefrom. The calibration element is positionally adjustable relative to the flag body. The calibration element is adapted to activate the proximity sensor when the linear drive is in a home position. The home position is adjustable upon adjustment of the calibration member. An actuation of the linear actuator drives the connecting member causing the lower base portion and upper base portion to pivot with respect to each other about the hinge, thereby changing an angle between the lower base portion and the upper base portion.

A dispensing pump includes a linear actuator mounted on a base. The linear actuator includes a drive rod having a coupler. The coupler joins the drive rod to a first end of a connecting member. A second end of the connecting member is secured to a lower base portion of the base. An attachment plate attaches a motor to a first end of an upper base portion of the base. A flag is secured to the drive rod coupler, wherein the flag moves directly with the drive rod. The flag includes a body and a calibration element. The calibration element is positionally adjustable relative to the flag body. The calibration element is adapted to activate a proximity sensor when the linear drive is in a home position. The home position is adjustable upon adjustment of the calibration member.

A dispensing pump includes a linear actuator mounted on a base. The linear actuator includes a drive rod having a coupler. The coupler joins the drive rod to a first end of a connecting member. A second end of the connecting member is secured to a lower base portion of the base. An attachment plate attaches a motor to a first end of an upper base portion of the base. A flag is secured to the drive rod coupler, wherein the flag moves directly with the drive rod. The flag includes a body and a calibration element. The calibration element is positionally adjustable relative to the flag body. The calibration element is adapted to activate a proximity sensor when the linear drive is in a home position. The home position is adjustable upon adjustment of the calibration member.