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Miniature air gauges

You RV folk are so nice to allow me to ask questions here about my Lancair, here is another (apologies for wrong forum, could not find the best one, feel free to move).

I want to install a tiny air gauge so I can keep an eye on my door seal (the system has had problems and I need to track what it is doing)

If anyone has any idea where to acquire this, I'd be grateful.
I know I've seen these but I cannot find on ASSCo, Ebay, Grainger, Amazon, McMasterCarr, Alibaba, welding supply, hardware stores etc etc.

0-15psi ideal (but 0-10 or 0-20 would be ok)
air-compatible gauge
here is the difficult part; I want it to be unobtrusive so 1" circular face max
mechanical preferred over electric/electronic but I can work with either

The hose is 1/4"OD so I will be adding a barbed fitting 1/8" or 1/4" male or female NPT (but I suppose I could make almost anything fit)

Thanks, guys.
 
That is perfect, Gary! Thanks.
I wish Universal did not have an 8-10 week lag time but I suppose I can be patient! Or, using your other info, I might find another source. Much appreciated.
 
HVAC pneumatic control systems used to have several different pressure gauges, i may have some will look. Might try a local HVAC supply house or a Controls Contractor in your area.

Keith Rhea
RV7 600+ hours.
 
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