The logic selector switch determines when the output relay actuates and de-actuates, thus while in position one, the relay is energized when the probe is in the vertical position and de-energizes when the probe is in the titled position, and while in position two, the actions are opposite.

In addition, an adjustable time-delay feature may be assigned to either the vertical or the tilt position to prevent false signals.

The relay assumes the de-energized position upon reaching the end of the delay period as well as upon failure of power to the controller.