current to flow through the transistor 36 to energize the coil 70 moving the single pole double throw switch element or member 72 to open or close activate or deactivate to send a continual signal to an external device the third sensor terminal 78 and the fourth sensor terminal 80 operate similarly when condensate or water is sensed between the first sensor probe not shown and the second sensor probe not shown the time delay section 50 prevents the control device from generating false readings or hunting when the condensate or water level is fluctuating at the predetermined level in the condensate reservoir not shown when installed the hvac is grounded to system ground which is at the same potential of the 24 vac transformer not shown due to the absence of a center tap transformer since the control device is powered by the 24 vac transformer not shown across the first terminal 22 and the second terminal 24 a voltage is induced in the first sensor pin not shown and the second sensor pin not shown that can cause a significant electrolysis and damage note that the resistor or impedance 46 is electrically connected to the transformer common at the same potential as at the pins not shown to reduce or mitigate the electrolysis the value of the first detection sensor component and the second detector sensor component are selected or balanced relative to each other and the impedance of the condensate or water specifically the impedance of the first detector sensor component and the second detector sensor component are substantially equal at least 20 megaohms each and preferably 30 megaohms each of course the various electronic components may be digitized.