What can you tell me about this brake sensor?

[Vapor Trail]

Does anyone know if I can get a brake pressure reading there and what the thread pitch might be. It’s probably a brake pressure sensor but there’s no fluid in the system and it’s reading closed with a meter so it’ll be a lot easier to wire into my harness with a very common normally open sensor. In an ideal world you would say that’s a 1/8” NPT and yes it gets a full pressure reading in that location.

 

[NDT]

Recall what all the brake proportioning valve does. If the front or rear brake circuits become unbalanced, a piston moves which activates a switch (pictured) that causes the “brake” warning light to illuminate.

 

[Vapor Trail]

So that won't help me then. I just saw somewhere else that it's dry in there so I don't think that spot will help me.