[Dsg-mvt] Request new manometer for Eel premix gas system + interlock

[Brian Eng]

Because of the fitting on the premix cylinders uses the same one as a hydrogen bottle, which can come with much higher pressure. I'm guessing the reverse thread fitting is common on flammable gas bottles?

Since the MVT is using a custom gas mixture that isn't a particular common one they don't really make regulators for it, at least not off the shelf like the ones we already have.

Hopefully after the lower scale high pressure side gauge is installed this matter will be put to rest.

> On Jun 12, 2017, at 1:28 PM, Amrit Yegneswaran <yeg at jlab.org> wrote:
> 
> but why in the world would anyone install or agree to the installation of a 0psi to 4000 psi gauge to measure 200 psi max from the cylinder. might as well measure the volume of the mvt in pc**3 (parsec**3), and conclude it doesn't exist. problem solved.