Fluid level sensor with combined capacitance and conductance

A fluid sensor has a first electrode, a second electrode, a housing containing the first and second electrodes, such that the electrodes extend from the housing, exposed metal between the first and second electrodes, and a drive signal electrically connected to the second electrode, such that when fluid is present in the reservoir, either the first electrode senses the presence of the fluid, or the drive signal senses presence of the fluid. A fluid sensor has a first electrode, a second electrode, a housing containing the first and second electrodes, a drive signal electrically connected to the second electrode, and sensing circuitry to measure a current from the second electrode to indicate a fluid level. 本申请公开了种流体传感器，其具有：第电极；第二电极；包含所述第电极和第二电极的外壳，使得所述电极从所述外壳延伸；在所述第和第二电极之间的暴露的金属；以及驱动信号，所述驱动信号电连接至所述第二电极，使得当流体存在于所述储存器中时，或者所述第电极感测所述流体的存在，或者所述驱动信号感测所述流体的存在。流体传感器具有：第电极；第二电极；包含所述第电极和第二电极的外壳；驱动信号，所述驱动信号电连接至所述第二电极；以及感测电路，所述感测电路用于测量来自所述第二电极的指示流体液位的电流。