I appreciate the info, and did not mean to come off rude if I did so in my original response. One final question and i'll leave this topic to rest-since the case sensor is a 5Vdc input with a millivolt return, how would the wiring look? The sensor i'm looking at (which I was informed was a case sensor) has 2 wires (red and black leads in a gray jacket), I would think there would have to be 3 for this (signal, common, and 5Vdc) based on what I have seen in the past.

Again, thanks for the info, you've been a great help.