What is the model number of your Autometer pressure gauge?
Is your original pressure sensor a pressure switch (fault light) or pressure sender (pressure gauge) or both.
Oil pressure gauge types:
Mechanical with [/s]filled gas tube[s] oil filled tube.
Electrical switch (on/off)
Electrical pressure (analog)
Electrical digital (digital communication with the gauge)
Electrical digital computer bus (digital but shares a bus system to talk to a central computer)
We have to figure out what you have before we can try to recommend what you need.
I've looked over the Autometer with a magnifying glass and the only mark are the white letters [4 80 or 89, can't tell], and am attaching pictures of both the sensor and the gauge. Would this be considered an electric air core gauge?