I bought this guy on Ebay thinking I could figure it out. I can't find any documentation on it anywhere. It only has two wires connected although the connector has four pins. I thought that that kind of setup would be a normally open or normally closed switch but that does not seem to be the case. Unless this thing is broken. Are there active circuits that only use two wires? If anyone could help me out I would sure appreciate it. I did see another thread with this probe and I left a post there but I was hoping the community could give me a hand.


Thanks
Bart