Abstract: A pump providing fault protection based on a controller receiving sensed pressure values from a pressure sensor included in a cavity of the pump, so as to be integral with the pump.

Abstract: An integral dual frequency by-pass and transient suppressor device has at least two ceramic semiconductor layers, the upper surfaces of which are formed with electrodes of generally U-shaped configuration. The base portions of the electrodes are exposed at opposite surfaces of the semiconductor layers, the leg portions of the U-shaped electrodes extending toward the base portions of electrodes of opposite polarity. The overlap or registration area of one pair of legs differs from the overlap area of the other leg pair with the result that two capacitors of different values are formed, the capacitors being in parallel and accordingly defining a low impedance path at two discrete frequencies. By varying the conductive paths as a function of the length of the electrode and/or the base of the U, a desired internal inductance is developed.