A system wherein a signal over a Universal Serial Bus interface is received by a receiver component. The graphical user interface includes a schema information region and a data visualization region. The calibration procedure, together with the unique controller, enable accurate control of the output parameters of the actuator. A method is provided for controlling electrostatic charge comprising providing a voltage source; providing a pressurized fluid source; connecting the emitter tip to the voltage source and to the fluid source; passing the fluid through the emitter tip; and electrically energizing the emitter tip. The Kelvin sensed hot-wire anemometer can be used in a number of applications, including, but not limited to medical devices that measure gas flow rates during inhalation and exhalation. R1, R2, R3, R4, R5, R6, R7, and R8 are, independently from each other, a hydrogen atom, a halogen, a hydroxy, amino, nitro, or thiol group, an optionally substituted alkyl, heteroalkyl, aryl, aralkyl, cycloalkyl, cycloaralkyl, heterocycloalkyl, heteroaralkyl, or heteroaryl rest.