Oil sensors
 

Hi all,
I have a 98 jetta glx 12v vr6, my oil was slowly dripping so i replaced oil filter housing o ring, when i removed it noticed my housing only has one sensor its a pressure sensor.
Looking at other vr6 s they all have 3 sensors, temperature, and 2 pressure sensors, why does mine only have one?
https://cimg3.ibsrv.net/gimg/volkswa...1664c891e0.jpg
Mine only has the 1.4 bar sensor