Eric Sedletzky
Contributor
I think you’re right.The spg is just a bourdon tube instrument. Getting the tube filled with silicone would be a trick and keeping it in there each time the spg is depressurized more of a trick. Not worth the effort for something so inexpensive. One tiny bubble at 3000 psi would evacuate the tube at 0 psi into the hose. What a mess that would make of things.
I’ll take that idea behind the barn and shoot it.