I was told by someone who ""should"" know, that mounting a sensor in the line with a "T" isn't good. Soooooooo, this would be, like five times worse that having the sensor actually IN THE OIL.
Just what I'm told, so take that for what it's worth... ... ..... No. I havn't used one.
It is best to have the sensor with the OIL FLOW passing directly over the end of said sensor. I did have on ein the oil pan and that was worthless. It would rarely read anything at all... ... ... ... my guage starts at 140°