I don't need one I have a recommendation for y'all and it's simple
Cliff notes: If you get a sandwich plate adapter
to mount additional sensors, get one that uses a single round O-ring
to seal against the engine. Avoid purchasing one that uses a flat gasket or some kind of pseudo-engineered shape O-ring.
Here's why. This is what I purchased at first
This is what it's sealing problems awarded me. After the car was parked in the garage for a while this is what dripped off the underside. Leaked like a sieve.
And you know what, I knew when I took it out of the box it looked questionable. THe seal was not flat across the top - had shrinkage lines and voids from the two ribs on the opposite side - and was harder durometer than it should have been. I am sticking my fingernail in this seal and the oil filter seal and thinking, "really?" I do this sort of thing every day at work and against my instinct I installed it.
After it confirmed my suspicions that it would leak, I ditched it for a cheap Ebay unit for $26 shipped, same shape of item, but uses only a single O-ring. The advantage being that even if the supplier of this unit screws up its O-ring durometer, size, hardness etc you can fix it with a few minutes of surfing through McMaster to get a silicone or Buna O-ring.
Here is why the single O-ring sandwich plate works better: The sealing surface has to generate at least the oil system pressure (80psi) to seal and prevent a leak. Of course you want more to have a factor of safety. The clamping pressure on the seal is set by how tight you make the mounting bolt.
Comparing the width of the O-ring to the flat seal on the leaking unit, the O-ring is only about one-seventh as wide. This means it will require one-seventh the clamping force to generate an effective seal compared to trying to tighten the flat gasket style down hard enough to generate 100psi across it's entire surface.
In these pics, the good unit is on the left and the leaker is on the right.
You can see the O-ring is much narrower than the flat rubber seal type
I hope this helps someone avoid the mistake I made. And the mess!
I am aware the oil filter uses a flat gasket style seal. The difference is the flat gasket type seal supplied with the "leaker" sandwich plate was a low quality POS, not flat, and hard. Just avoid the whole issue by getting a sandwich plate with a single O-ring as you will always be able to "save" a single O-ring type of design and make it work.
It's true that one could just tighten the "leaker" to the point where it would not leak. But it would have to be seven times as tight as the O-ring version to do so. Why bother? Also when I tightened down the single O-ring unit, you could feel it set in place: First the O-ring compressed fully, then I could feel it go metal-on-metal as the O-ring was compressed level with it's groove, and that's when I knew to stop tightening. It's also why I will take O-rings over gaskets for liquid sealing any day of the week.