I want To Add A Second Gauge To My Air Venturi Tank ?

@heavy-impact Would this one work? Looks like a basic manometer. I’m not sure if the valve comes with it or what.
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Or are you looking for one like the small one on the left in the circled photo? Or maybe you could unscrew the foster fitting on one like the gauge in this link https://airtanksplus.com/product/quick-connect-pressure-gauge/

Either that or maybe call the company and ask if they’ll just sell you the manometer without the foster fitting. 
 
@heavy-impact Would this one work? Looks like a basic manometer. I’m not sure if the valve comes with it or what.

Or are you looking for one like the small one on the left in the circled photo? Or maybe you could unscrew the foster fitting on one like the gauge in this link https://airtanksplus.com/product/quick-connect-pressure-gauge/

Either that or maybe call the company and ask if they’ll just sell you the manometer without the foster fitting.

I just found them on Mr Broncato's most aggravating website. Navagating his site is like playing where's Waldo. He lists the gauges with no specs and no pictures (Opt.1) so you have to find a picture of it on another product he sells. I really don't like to talk on the phone and I've heard he can talk the horns off a billy goat. I believe he's a good man though so don't take my minor complaints the wrong way.

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@heavy-impact Glad you found it. I agree it’s difficult to navigate that site, especially on a phone. Let us know what the price point is on one of those. I have the same tank.

It's $50 shipped. I just realized I have the same gauge on my alpha filter so I'll swap it for a different one I have on hand. I'll wait until my bottle gets low because I just filled it.

Thanks for the help.
 
The thread on the smaller gauge is 1/8 NPT. If you already have a Brancato yoke assembly without a second gauge, how are you going to attach it? There isn't a threaded hole with a plug in it for the second gauge that I know of if you have a fill assembly with a single large gauge. The only other threaded opening would be the burst disk.

Brancato gets those gauges mass produced in China for less than a buck apiece. Nice markup to sell them for $39. The one on my yoke is totally inaccurate and is 200 psi higher than the larger gauge reads when checked with a dead head plug.
 
The thread on the smaller gauge is 1/8 NPT. If you already have a Brancato yoke assembly without a second gauge, how are you going to attach it? There isn't a threaded hole with a plug in it for the second gauge that I know of if you have a fill assembly with a single large gauge. The only other threaded opening would be the burst disk.

You are correct. The other hole is a burst disc so I'll probably leave it alone but I do have a mill if I decide to add another hole. Thank you for your help.